CN112894432A - Clamp for machining gearbox connecting shell - Google Patents
Clamp for machining gearbox connecting shell Download PDFInfo
- Publication number
- CN112894432A CN112894432A CN202110292057.3A CN202110292057A CN112894432A CN 112894432 A CN112894432 A CN 112894432A CN 202110292057 A CN202110292057 A CN 202110292057A CN 112894432 A CN112894432 A CN 112894432A
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- workpiece
- positioning
- upright post
- machining
- positioning plate
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- 238000003754 machining Methods 0.000 title claims description 18
- 238000003825 pressing Methods 0.000 claims abstract description 16
- 230000002452 interceptive effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
-
- 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
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a fixture for processing a gearbox connecting shell, which comprises a base, wherein a positioning plate is arranged on one side of the upper end surface of the base, a portal structure is arranged on the other side of the upper end surface of the base, and an accommodating space for placing a workpiece is formed between the positioning plate and the portal structure; wherein: the positioning plate is provided with a positioning hole for accommodating the first end of the workpiece, and a pressing piece for fixing the first end of the workpiece is arranged on the positioning plate positioned on the periphery of the positioning hole; the portal structure comprises a cross beam, a first upright post and a second upright post, wherein one end of the cross beam is rotatably connected with the first upright post, and the other end of the cross beam is detachably connected with the second upright post; and the door frame structure is provided with a locking piece for fixing the second end of the workpiece. The first end of the workpiece is fixed through the positioning disc on the positioning plate, the second end of the workpiece is fixed through the door frame structure and the supporting piece, the two sides of the workpiece are clamped tightly, the position of the workpiece can be effectively fixed at one time, and the workpiece processing is facilitated.
Description
Technical Field
The invention relates to the technical field of clamps, in particular to a clamp for machining a gearbox connecting shell.
Background
The gearbox connecting shell is an important workpiece in a gearbox assembly of a forklift driving system. The workpiece is in a special-shaped bell mouth shape, a cavity is arranged in the workpiece, the wall thickness of the workpiece is only 11mm at the thinnest, and the workpiece is a typical thin-wall irregular special-shaped casting. The production requirement is that the form and position tolerance of the gearbox connecting shell is not more than 0.05mm, and the precision requirement can be met.
The existing gearbox connecting shell processing technology is that a simple tool is manufactured on a vertical processing center, one end is processed firstly, then clamping is carried out for the second time, and the other end is processed. The disadvantages of this method are: 1. the precision is difficult to guarantee by secondary clamping; 2. the workpiece needs to be turned over and turned around, the operation is difficult, and time and labor are consumed; 3. the length of the workpiece exceeds 500mm, the vertical clamping is unreliable, and vibration is easy to generate in the machining process.
Disclosure of Invention
The invention aims to provide a clamp for machining a connecting shell of a gearbox, which aims to solve the problems in the background art, not only can meet the requirement of one-time rapid machining forming, but also can ensure that the precision of a workpiece meets the production requirement.
In order to achieve the purpose, the invention provides the following technical scheme:
a clamp for machining a gearbox connecting shell comprises a base, wherein a positioning plate is arranged on one side of the upper end face of the base, a portal structure is arranged on the other side of the upper end face of the base, and an accommodating space for accommodating a workpiece is formed between the positioning plate and the portal structure; wherein:
the positioning plate is provided with a positioning hole for accommodating the first end of the workpiece, and a pressing piece for fixing the first end of the workpiece is arranged on the positioning plate positioned on the periphery of the positioning hole;
the portal structure comprises a cross beam, a first upright post and a second upright post, wherein one end of the cross beam is rotatably connected with the first upright post, and the other end of the cross beam is detachably connected with the second upright post; and the door frame structure is provided with a locking piece for fixing the second end of the workpiece.
As a further scheme of the invention: and a supporting piece for supporting the bottom of the workpiece is fixedly arranged on the base below the accommodating space.
As a further scheme of the invention: the support piece comprises a pre-positioning rod and an elastic telescopic rod.
As a further scheme of the invention: the positioning hole is fixedly connected with a hollow positioning disc, and the inner ring of the positioning disc is provided with a stepped structure for accommodating the first end of the workpiece.
As a further scheme of the invention: the cross beam rotates around the first upright post, the plane of the motion track of the cross beam is parallel to the base, and the rotation angle is not less than 90 degrees.
As a further scheme of the invention: one end of the pressing piece is rotatably connected with the positioning plate, and the other end of the pressing piece is abutted against the workpiece.
As a further scheme of the invention: a plurality of mounting holes are formed in the cross beam, the first stand column and the second stand column, and the locking piece penetrates through the mounting holes and is abutted to the workpiece.
As a further scheme of the invention: the locking piece is a locking bolt, and the locking bolt is in threaded connection with the mounting hole.
Compared with the prior art, the invention has the beneficial effects that:
the first end of the workpiece is fixed through the positioning disc on the positioning plate, the second end of the workpiece is fixed through the portal structure, the workpiece is clamped from two sides, the position of the workpiece can be effectively fixed at one time, and machining operation is facilitated. The pre-positioning is carried out through the pre-positioning rod, the height of the elastic telescopic rod is adjusted, sufficient support and fixation are provided for the bottom of a workpiece, and the operation is convenient and rapid. A plurality of locking bolts arranged on the gantry structure independently adjust respective axial displacement to match with the special-shaped structure of the workpiece, so that the fixation is more reliable. The cross beam of the portal structure can be rotatably designed into an enough avoiding space for hoisting the workpiece, so that the assembly is more flexible, and the vibration in the workpiece machining process can be reduced by closing the portal structure. Be equipped with the action bars on compressing tightly the piece, conveniently pull and rotatory operation. The lifting screws on the two sides of the base prevent the sling from interfering with the clamp during lifting.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the working state of the present invention;
FIG. 3 is a schematic view from another angle of FIG. 2;
FIG. 4 is a cross-sectional view of the elastic telescopic shaft of the present invention;
in the figure: 1-base, 11-lifting screw, 2-positioning plate, 21-positioning hole, 22-pressing piece, 221-operating rod, 23-positioning plate, 3-gantry structure, 31-cross beam, 311-notch, 32-first upright, 33-second upright, 34-locking piece, 35-pin shaft, 36-positioning bolt, 4-supporting piece, 41-prepositioning rod, 42-elastic telescopic rod, 421-shaft sleeve, 422-spring, 423-top, 424-fixing pin, 5-workpiece and 6-reinforcing rib.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, in the embodiment of the present invention, a fixture for processing a gearbox connecting shell includes a base 1, a positioning plate 2 is disposed on one side of an upper end surface of the base 1, and a gantry structure 3 is disposed on the other side of the upper end surface of the base 1, and both the positioning plate 2 and the gantry structure 3 are perpendicular to the upper end surface of the base 1; an accommodating space for accommodating a workpiece 5 is formed between the positioning plate 2 and the gantry structure 3; the workpiece 5 has a through horn-shaped structure, and two opposite openings of the through horn-shaped structure are respectively a first end and a second end.
The positioning plate 2 is provided with a positioning hole 21 for accommodating the first end of the workpiece 5, and a pressing piece 22 for fixing the first end of the workpiece 5 is arranged on the positioning plate 2 at the periphery of the positioning hole 21; a hollow positioning disc 23 is fixedly connected to the positioning hole 2, the positioning disc 23 has a stepped structure for accommodating a first end of the workpiece 5, and the positioning disc 23 is connected with the first end of the workpiece 5 in a matching manner; a chamfer is preset at the stepped structure of the positioning disc 23, so that the workpiece 5 can be conveniently put in.
Further, one end of the pressing piece 22 is rotatably connected with the positioning plate 2, and the other end abuts against the workpiece 5. In the present embodiment, the number of the pressing members 22 is 4, and the pressing members 22 are circumferentially arranged around the positioning holes 21, so that before the workpiece 5 is machined, the pressing members 22 can be rotated outward to prevent interference when being assembled with the workpiece 5, and when the first end of the workpiece 5 is placed in the positioning plate 23, the pressing members 22 are rotated inward to press the end portions thereof against the first end of the workpiece 5. In addition, the surface of the pressing member 22 is provided with an operating rod 221, the operating rod 221 can facilitate the rotation and dragging of the pressing member 22, and the operating rod 221 is arranged perpendicular to the positioning plate 2.
Further, the gantry structure 3 includes a cross beam 31, a first upright column 32 and a second upright column 33, wherein one end of the cross beam 31 is rotatably connected with the first upright column 32, and the other end of the cross beam 31 is detachably connected with the second upright column 33; be equipped with retaining member 34 that is used for fixed work piece 5 second end on the portal structure 3, this retaining member 34 is locking bolt, all seted up a plurality of mounting holes on crossbeam 31, first stand 32, the second stand 33, locking bolt passes mounting hole and 5 butts of work piece, locking bolt is threaded connection with the mounting hole. The cross beam 31, the first upright column 32 and the second upright column 33 respectively abut against the second end of the workpiece 5 from the upper direction, the left direction and the right direction of the workpiece 5, and the second end of the workpiece 5 is fixed through a locking bolt. The cross beam 31 can rotate around the first upright post 32, the plane of the motion track is parallel to the base 1, and the rotation angle is not less than 90 °. One end of the cross beam 31 is connected with the first upright post 32 through a pin shaft 35, the other end of the cross beam 31 is provided with a notch 311, the top of the second upright post 33 is provided with a positioning bolt 36, and the positioning bolt 36 can be accommodated in the notch 311.
Furthermore, the upper end face of the base 1 below the accommodating space is also provided with a support member 4, the support member 4 abuts against the bottom of the second end of the workpiece 5 from the lower part of the workpiece, and the cross beam 31, the first upright column 32 and the second upright column 33 are matched with the support member 4 to fix the second end of the workpiece 5 from four directions, so that the workpiece 5 is fixed more firmly. The support 4 comprises two pre-positioning rods 41 and two elastic telescopic rods 42; wherein, the height of the pre-positioning rod 41 is fixed, and the height setting satisfies: when the workpiece 5 is fixed, the workpiece 5 has a clearance of 5-10mm from the top end of the pre-positioning rod 41. As shown in fig. 4, the elastic telescopic rod 42 includes a shaft sleeve 421, the shaft sleeve 421 has an axial receiving cavity, a spring 422 is disposed at the bottom of the receiving cavity, a top 423 is disposed above the spring 422, and the top of the top 423 is disposed outside the shaft sleeve 421; the side wall of the shaft sleeve 421 radially penetrates a fixing pin 424, and the end of the fixing pin 424 abuts against the side wall of the head 423. Further, the plug 423 is shaft-shaped, and a smooth concave part is arranged at the position where the plug 423 abuts against the fixing pin 424, the concave part has an inclined linear transition, and the axial limit of the plug 423 can be adjusted conveniently through the depth of the insertion of the fixing pin 424. When the workpiece 5 is fixed, the top 423 abuts against the bottom of the workpiece 5, the spring 422 is in a compressed state, the height of the elastic telescopic rod 42 can be limited by pushing the fixing pin 424, and the top 423 is ensured to be in an abutting state against the bottom of the workpiece 5. It should be noted that the maximum height of the elastic telescopic rod 42 is smaller than the height of the positioning rod 41, and the minimum height is larger than the height of the positioning rod 41.
Furthermore, in order to prevent the vertical positioning plate 2 from transversely shaking during assembly, a reinforcing rib 6 is arranged at the joint of the positioning plate 2 and the base 1 at the other side of the accommodating space, and two adjacent edges of the reinforcing rib 6 are fixedly connected with the positioning plate 2 and the base 1 respectively. Furthermore, lifting screws 11 are arranged on two sides of the base 1, and therefore the interference between a sling and a clamp when the clamp is lifted is avoided.
The working principle of the invention is as follows:
before the workpiece 5 is clamped, the clamping device is placed on a platform, the four clamping pieces 22 are pulled outwards to vacate positions, and the workpiece 5 is prevented from interfering in the clamping process. The beam 31 of the gantry structure 3 is in an open state, namely, is rotated outwards by the pin shaft 35 to be opened by more than 90 degrees, so that the workpiece 5 can be conveniently hoisted. The height of the pilot rod 41 was set to 170mm, and the distance from the workpiece 5 after being clamped was 5 mm. The fixing pin 424 of the elastic expansion link 42 is in a state of abutting against the side wall of the top 423, and the spring 422 is compressed to the shortest, so as to prevent the workpiece 5 from interfering with the elastic expansion link 42 when being put into the fixture.
Lifting the workpiece 5 from top to bottom to enable the workpiece 5 to be placed between the first upright post 32 and the second upright post 33, driving the workpiece 5 to move towards the positioning plate 23 in parallel when the height of the workpiece 5 is approximately consistent with the height of the positioning plate 23 visually, and enabling the first ends of the workpieces 5 of the positioning plate 23 to be placed in the middle of the positioning plate 23 to enable the first ends of the workpieces 5 of the positioning plate 23 to be abutted together in a matching mode; the workpiece 5 can also be axially rotated, and the workpiece 5 is slightly rotated until the bottom of the workpiece is stably positioned above the top head 423. Then, the four pressing members 22 are rotated inward to be uniformly pressed on the first end of the workpiece 5, the fixing pin 424 is screwed outward, the top 32 is pressed against the bottom of the workpiece 5 due to the action of the spring force, and the fixing pin 424 is screwed inward to enable the fixing pin 424 and the top 423 to be abutted tightly, so that the supporting is completed. At this time, the cross beam 31 is rotated back to clamp the notch 311 with the positioning bolt 36, and the workpiece 5 is fixed from above the second end of the workpiece 5, so as to prevent the workpiece 5 from generating vibration due to insufficient rigidity during the machining process. And finally, screwing the locking bolt until the end part of the locking bolt abuts against the outer wall of the workpiece 5.
Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.
Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (8)
1. A clamp for machining a gearbox connecting shell comprises a base (1) and is characterized in that a positioning plate (2) is arranged on one side of the upper end face of the base (1), a portal structure (3) is arranged on the other side of the upper end face of the base, and an accommodating space for accommodating a workpiece (5) is formed between the positioning plate (2) and the portal structure (3); wherein:
the positioning plate (2) is provided with a positioning hole (21) for accommodating the first end of the workpiece (5), and a pressing piece (22) for fixing the first end of the workpiece (5) is arranged on the positioning plate (2) positioned at the periphery of the positioning hole (21);
the portal structure (3) comprises a cross beam (31), a first upright post (32) and a second upright post (33), wherein one end of the cross beam (31) is rotatably connected with the first upright post (32), and the other end of the cross beam is detachably connected with the second upright post (33); and a locking piece (34) used for fixing the second end of the workpiece (5) is arranged on the door frame structure (3).
2. The fixture for machining the connecting shell of the gearbox is characterized in that a supporting piece (4) for supporting a workpiece (5) is fixedly arranged on the base (1) below the accommodating space.
3. The jig for machining a gearbox connecting shell according to claim 2, characterized in that the support member (4) comprises a pre-positioning rod (41) and an elastic telescopic rod (42).
4. The fixture for machining the gearbox connecting shell is characterized in that a hollow positioning disc (23) is fixedly connected to the positioning hole (2), and the inner ring of the positioning disc (23) is of a stepped structure for accommodating the first end of the workpiece (5).
5. The fixture for machining the gearbox connecting shell according to claim 1, wherein the cross beam (31) rotates around the first upright post (32), the plane of the motion track of the cross beam is parallel to the base (1), and the rotation angle is not less than 90 degrees.
6. The fixture for machining the gearbox connecting shell as recited in claim 1, characterized in that one end of the pressing piece (22) is rotatably connected with the positioning plate (2), and the other end abuts against the workpiece (5).
7. The clamp for machining the gearbox connecting shell is characterized in that a plurality of mounting holes are formed in the cross beam (31), the first upright post (32) and the second upright post (33), and the locking piece (34) penetrates through the mounting holes and abuts against a workpiece (5).
8. The clamp for machining the gearbox connecting shell as recited in claim 7, characterized in that the locking member (34) is a locking bolt which is in threaded connection with the mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110292057.3A CN112894432A (en) | 2021-03-18 | 2021-03-18 | Clamp for machining gearbox connecting shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110292057.3A CN112894432A (en) | 2021-03-18 | 2021-03-18 | Clamp for machining gearbox connecting shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112894432A true CN112894432A (en) | 2021-06-04 |
Family
ID=76105443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110292057.3A Pending CN112894432A (en) | 2021-03-18 | 2021-03-18 | Clamp for machining gearbox connecting shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112894432A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202607327U (en) * | 2012-04-26 | 2012-12-19 | 宁波斯达弗液压传动有限公司 | Clamp specially for processing of shell of variable displacement motor |
| US20130113149A1 (en) * | 2011-11-07 | 2013-05-09 | Kia Motors Corporation | Apparatus for clamping panel for vehicle |
| CN103862311A (en) * | 2014-03-31 | 2014-06-18 | 万世泰金属工业（昆山）有限公司 | Sawing machine clamp |
| CN203804618U (en) * | 2014-05-15 | 2014-09-03 | 宁海县海裕铝业有限公司 | Fixture for thermostat valve seat |
| CN205057558U (en) * | 2015-09-22 | 2016-03-02 | 安徽合力股份有限公司 | A anchor clamps for metalworking of forklift speed changing box box |
| CN205057554U (en) * | 2015-09-08 | 2016-03-02 | 安徽合力股份有限公司 | A anchor clamps for processing of forklift speed changing box box |
| CN110900280A (en) * | 2019-10-26 | 2020-03-24 | 重庆铁马工业集团有限公司 | Method for positioning by using internal thread bottom hole of gearbox body |
| CN214685349U (en) * | 2021-03-18 | 2021-11-12 | 安徽合力股份有限公司 | Clamp for machining gearbox connecting shell |
-
2021
- 2021-03-18 CN CN202110292057.3A patent/CN112894432A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130113149A1 (en) * | 2011-11-07 | 2013-05-09 | Kia Motors Corporation | Apparatus for clamping panel for vehicle |
| CN202607327U (en) * | 2012-04-26 | 2012-12-19 | 宁波斯达弗液压传动有限公司 | Clamp specially for processing of shell of variable displacement motor |
| CN103862311A (en) * | 2014-03-31 | 2014-06-18 | 万世泰金属工业（昆山）有限公司 | Sawing machine clamp |
| CN203804618U (en) * | 2014-05-15 | 2014-09-03 | 宁海县海裕铝业有限公司 | Fixture for thermostat valve seat |
| CN205057554U (en) * | 2015-09-08 | 2016-03-02 | 安徽合力股份有限公司 | A anchor clamps for processing of forklift speed changing box box |
| CN205057558U (en) * | 2015-09-22 | 2016-03-02 | 安徽合力股份有限公司 | A anchor clamps for metalworking of forklift speed changing box box |
| CN110900280A (en) * | 2019-10-26 | 2020-03-24 | 重庆铁马工业集团有限公司 | Method for positioning by using internal thread bottom hole of gearbox body |
| CN214685349U (en) * | 2021-03-18 | 2021-11-12 | 安徽合力股份有限公司 | Clamp for machining gearbox connecting shell |
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