CN210306901U - Special clamp for gland machining - Google Patents
Special clamp for gland machining Download PDFInfo
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- CN210306901U CN210306901U CN201921218500.7U CN201921218500U CN210306901U CN 210306901 U CN210306901 U CN 210306901U CN 201921218500 U CN201921218500 U CN 201921218500U CN 210306901 U CN210306901 U CN 210306901U
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Abstract
The utility model discloses a gland machining special fixture belongs to the machining instrument. When the outer arc surface of gland claw shape is processed, lathe three-jaw chuck and four-jaw chuck can't satisfy the problem that the clamping required, this scheme provides a gland machining anchor clamps, including anchor clamps owner core, interior gland, outer gland, nut, the nut is connected with the screw rod cooperation of anchor clamps owner core, with interior gland, outer gland locking between nut and anchor clamps owner core, press from both sides the gland of required processing tightly on anchor clamps owner core through interior gland and outer gland, conveniently process the outer arc surface of gland claw shape. Compared with a three-jaw chuck and a four-jaw chuck which are commonly used, the clamp is convenient, accurate and quick in clamping process, the situation that the clamp is mistakenly cut is avoided, and the machining efficiency of the gland is improved.
Description
Technical Field
The utility model relates to a machining tool of gland, more specifically say, relate to a gland machining special fixture.
Background
The utility model discloses the gland blank that processes is the foundry goods, and its structural feature is: the main body is a circular ring, the outer diameter of the circular ring is 95mm, the inner diameter of the circular ring is 55mm, and the thickness of the circular ring is 7 mm; 4 claw-shaped bulges are arranged at the edge of the circular ring, the height is 20mm, and the width is 20 mm; the outer edge of the claw-shaped bulge is an arc surface with the diameter of 105 mm; and a claw-shaped rib is connected between each claw-shaped bulge and the circular ring main body.
The mechanical processing requirements of the gland are as follows: the end face of the circular ring and the claw-shaped outer arc surface are subjected to mechanical cutting, and the rest surfaces are not required to be subjected to mechanical cutting; the tolerance requirement of the verticality between the claw-shaped outer arc surface and the end surface of the circular ring is less than or equal to 0.03mm, and the tolerance requirement of the same roundness between the claw-shaped outer arc surface and the inner circle and the outer circle of the circular ring is less than or equal to 0.2 mm.
When the end face of the gland ring is processed, the three-jaw chuck of a lathe can be directly used for clamping the inner arc surface of the ring for mechanical cutting processing, but when the outer arc surface of the gland claw is processed, the problems are as follows:
(1) the gland ring is small in thickness, and if the three-jaw chuck of the lathe is directly used for clamping the inner arc surface of the ring, the probability that the turning tool mistakenly cuts the three-jaw chuck is high.
(2) The inner arc surface of the gland ring is a molding surface which is artificially polished after casting, the dimensional tolerance is large, and if the inner arc surface of the gland ring is directly clamped by a three-jaw chuck of a lathe, the surface is taken as a reference, so that the verticality tolerance of the outer arc surface of the jaw shape and the end surface of the ring is difficult to ensure to meet the requirement.
(3) Because there are 4 claw-shaped bulges, the lathe three-jaw chuck can not clamp the outer arc surface of the gland ring, and the outer arc surface is a molding surface which is artificially polished after casting, so that the dimensional tolerance is large, and the surface can not be used as a reference.
(4) The lathe four-jaw chuck can clamp the outer arc surface of the gland ring, but the requirement that the tolerance of the outer arc surface of the jaw and the roundness of the inner circle and the outer circle of the ring meet the requirement is difficult to guarantee, and the clamping process is time-consuming and labor-consuming.
Therefore, the special clamp is designed to mechanically cut the claw-shaped outer arc surface of the gland, so that the dimensional tolerance and the position tolerance of the claw-shaped outer arc surface are qualified, the clamping process is convenient, accurate and rapid, and the special clamp has important significance for the mechanical processing of the gland.
Chinese patent application, application number 200910252820.9, open 3 months 21 days of 2012, disclose a three-jaw chuck, jack catch including chuck body and three looks isostructure, the chuck body be provided with and compress tightly work piece mechanism, should compress tightly work piece mechanism and slide seat, staff and round the rotatory eccentric hand wheel of staff including the frame shape, the frame shape slide the seat have last opening board and with the parallel lower sliding strip that fuses of last opening board, the staff be fixed in the last opening board that the frame shape slided the seat, lower sliding strip along the track groove reciprocating displacement that sets up on the chuck body, the chuck body on the extension line of the central line of track groove intersect with the central line of chuck body. The three-jaw chuck has the advantages that the use is convenient, the phenomenon of loosening and slipping of a workpiece blank can be avoided, and the defects that when the three-jaw chuck is used for clamping a gland of a lathe, the three-jaw chuck is easy to be mistakenly cut by a lathe tool, and the verticality tolerance between the claw-shaped outer arc surface and the circular ring end surface is difficult to ensure to meet the requirement.
The invention discloses a four-jaw chuck, which is characterized in that four jaws are arranged on two sides of a central point and an axis vertical to the center of a chuck body along the Chinese patent application No. 201210183297.0, published 2013, 12 and 25, and each jaw independently moves towards the center of the chuck body, a pointer is fixedly arranged on the side surface of each jaw, and a scale is fixedly arranged on the chuck body on one side of each jaw along the moving direction of the jaw. The invention can conveniently and quickly determine the position of the top point of the clamping jaw, reduces the trouble in work, and has the disadvantages that when the outer arc surface of the gland ring is clamped and processed, the same roundness tolerance of the outer arc surface of the clamping jaw and the inner circle and the outer circle of the ring is difficult to meet the requirement, and the clamping process is time-consuming and labor-consuming.
SUMMERY OF THE UTILITY MODEL
1. Problems to be solved
When the outer arc surface of processing gland claw shape, the unable problem that satisfies the clamping requirement of lathe three-jaw chuck and four-jaw chuck, the utility model provides a gland machining special fixture. The utility model discloses can make the clamping process convenient, accurate, quick to can ensure that the dimensional tolerance, the position tolerance of the outer arc surface of claw shape that make the gland are qualified.
2. Technical scheme
In order to solve the above problem, the utility model adopts the following technical scheme:
the special clamp for machining the gland comprises a main clamp core, an inner gland, an outer gland and a nut, wherein the nut is connected with a screw rod of the main clamp core in a matched mode, and the inner gland and the outer gland are locked between the nut and the main clamp core.
Furthermore, the bottom of the main core of the fixture is provided with a clamping cylinder, the upper part of the clamping cylinder is provided with a flange, the upper center of the flange is connected with an inner core, the upper part of the flange is positioned around the inner core and provided with an annular groove I, the upper part of the inner core is connected with a screw rod, and the clamping cylinder ensures that the fixture can be installed on a three-jaw chuck.
Furthermore, the longitudinal section of the groove I is quadrilateral, two side faces of the groove I are inclined planes which are parallel to each other, the inclined plane on one side of the groove I, which is close to the inner core, extends to the lower part of the inner core, and when a component is inserted into the groove I, air in the groove I is discharged through the inclined plane, so that the internal air pressure cannot hinder the matching between the components.
Furthermore, the inner gland is of a circular ring structure, one end of the inner gland is a conical part, the other end of the inner gland is a circular ring part, the inner side of the circular ring is a matching hole, the outer diameter of the circular ring of the inner gland is matched with the inner diameter of the circular ring of the gland, and the claw-shaped outer arc surface of the gland and the inner circle of the circular ring of the gland meet the requirement of the same roundness tolerance.
Furthermore, the inner core of the main core of the clamp penetrates through the matching hole of the inner gland, and the center of the inner gland is ensured to be coincided with the center of the main core of the clamp.
Furthermore, the conical part of the inner gland is inserted into the groove I of the main core of the clamp, so that the conical part has a sizing effect, and the inner diameter of the gland is ensured to meet the specification.
Furthermore, the outer gland is of a circular ring structure, the middle of the upper portion of the circular ring is provided with the mounting hole, the lower portion of the circular ring is provided with the groove II, an inner hole is formed in the inner side of the lower portion of the circular ring, the outer diameter of the circular ring of the outer gland is the same as that of the gland, and the same roundness tolerance of the claw-shaped outer arc surface of the gland and the outer circle of the circular ring of the gland meets the requirement.
Furthermore, the mounting hole of the outer gland is sleeved outside the screw rod of the main core of the clamp, so that the center of the outer gland is coincident with the center of the main core of the clamp.
Furthermore, the inner diameter of the inner hole at the lower part of the outer gland is matched with the outer diameter of the inner gland, and the upper part of the inner hole is in surface contact with the upper part of the conical part of the inner gland, so that the inner gland is tightly matched with the outer gland, and the verticality tolerance of the claw-shaped outer arc surface of the gland and the annular end surface of the gland meets the requirement.
Furthermore, the circular concave surface of the groove II extends from the outer side of the circular ring to the inner side of the lower part of the circular ring, and the concave surface is matched with the circular-arc-shaped claw rib of the gland to cover the gland, so that a lathe can machine the claw-shaped outer circular arc surface of the gland.
3. Advantageous effects
Compare in direct use lathe three-jaw chuck and four-jaw chuck, the beneficial effects of the utility model are that:
(1) the scheme is composed of a clamp main core, an outer gland, an inner gland and a nut, can detect the precision of a corresponding to-be-detected piece at one time, and is simple in structure and easy to manufacture;
(2) the bottom of the main core of the fixture is a clamping cylinder, so that the main core of the fixture can be fixed on a traditional chuck, and the upper part of the main core of the fixture is a screw rod, so that the whole fixture can be more compact by combining a nut;
(3) the longitudinal section of the groove I is quadrilateral, two side faces of the groove I are inclined planes which are parallel to each other, the inclined plane of one side of the groove I, which is close to the inner core, extends to the lower part of the inner core, and when a component is inserted into the groove I, air in the groove I is exhausted through the inclined plane, so that the internal air pressure cannot hinder the matching between the components, and the clamp is ensured to be easy to mount;
(4) the inner gland is of a circular structure, the outer diameter of a circular ring of the inner gland is matched with the inner diameter of the circular ring of the gland, and the same roundness tolerance of the claw-shaped outer arc surface of the gland and the inner circle of the circular ring of the gland is ensured to meet the requirement;
(5) an inner core of the main core of the clamp penetrates through a matching hole of the inner gland to ensure that the center of the inner gland is coincided with the center of the main core of the clamp;
(6) the conical part of the inner gland is inserted into the groove I of the main core of the clamp, so that the conical part has a sizing effect and the inner diameter of the gland is ensured to meet the specification;
(7) the outer gland is of a circular ring structure, the outer diameter of a ring of the outer gland is the same as that of the gland, and the same roundness tolerance of a claw-shaped outer arc surface of the gland and the excircle of the ring of the gland meets the requirement;
(8) the mounting hole of the outer gland is sleeved outside the screw rod of the main core of the clamp, so that the center of the outer gland is ensured to be superposed with the center of the main core of the clamp;
(9) the inner diameter of the inner hole at the lower part of the outer gland is matched with the outer diameter of the inner gland, and the upper part of the inner hole is in surface contact with the upper part of the conical part of the inner gland, so that the inner gland is tightly matched with the outer gland, and the verticality tolerance of the claw-shaped outer arc surface of the gland and the end surface of the gland ring meets the requirement;
(10) the circular concave surface of the groove II of the outer gland extends from the outer side of the ring to the lower part of the inner side of the ring, and the concave surface is matched with the arc-shaped claw rib of the gland to cover the gland, so that a lathe can machine the claw-shaped outer arc surface of the gland.
Drawings
FIG. 1 is a schematic structural view of a special fixture for gland machining according to the present embodiment;
FIG. 2 is a schematic view of the gland in front view;
FIG. 3 is a schematic sectional view of the gland in the present embodiment;
FIG. 4 is a schematic view of a main core of the fixture according to the present embodiment;
FIG. 5 is a schematic side view of the main core of the clamp according to the present embodiment;
FIG. 6 is a schematic view of the inner gland in a front view;
FIG. 7 is a schematic sectional view of the inner gland of the present embodiment;
fig. 8 is a schematic structural view of the outer gland in the scheme;
FIG. 9 is a schematic cross-sectional view of the external pressure cover of the present embodiment;
fig. 10 is a schematic top view of the external pressure cover of the present embodiment.
In the figure: 1. a clamp primary core; 2. an inner gland; 3. an outer gland; 4. a nut; 5. a gland; 11. clamping the cylinder; 12. a flange; 13. a groove I; 14. an inner core; 15. a screw; 21. a tapered portion; 22. a mating hole; 31. mounting holes; 32. a groove II; 33. an inner bore; 51. claw-shaped ribs; 52. an inner circular hole.
Detailed Description
The invention will be further described with reference to specific embodiments and drawings.
Example 1
As shown in fig. 1 to 10, a special clamp for gland machining includes a main clamp core 1, an inner gland 2, an outer gland 3 and a nut 4, wherein the nut 4 is connected with a screw 15 of the main clamp core 1 in a matching manner, so that the inner gland 2 and the outer gland 3 are locked between the nut 4 and the main clamp core 1, and the gland 5 is prevented from sliding during machining.
The clamp is characterized in that the bottom of the main core 1 of the clamp is a clamping cylinder 11, a flange 12 is arranged on the upper portion of the clamping cylinder 11, an inner core 14 is connected to the center of the upper portion of the flange 12, an annular groove I13 is formed in the position, located around the inner core 14, of the upper portion of the flange 12, and a screw rod 15 is connected to the upper portion of the inner core 14. The longitudinal section of the groove I13 is quadrilateral, two side faces of the groove I13 are inclined planes which are parallel to each other, the inclined plane on one side of the groove I13, which is close to the inner core 14, extends to the lower part of the inner core 14, and air in the groove I13 is exhausted through the inclined planes, so that the internal air pressure cannot hinder the matching between the parts.
The inner gland 2 is of a circular ring-shaped structure, one end of the inner gland 2 is a conical part 21, the other end of the inner gland is a circular ring part, the inner side of the circular ring is a matching hole 22, and the inner core 14 of the clamp main core 1 penetrates through the matching hole 22 of the inner gland 2, so that the center of the inner gland 2 is coincided with the center of the clamp main core 1. The tapered portion 21 of the inner gland 2 is inserted into the groove I13 of the clamp main core 1, so that the tapered portion 21 has a sizing effect, and the inner diameter of the gland 5 is ensured to meet the specification. The outer diameter of the ring of the inner gland 2 is matched with the inner diameter of the ring of the gland 5, so that the same roundness tolerance of the claw-shaped outer arc surface of the gland 5 and the inner circle of the ring of the gland 5 meets the requirement.
The outer gland 3 be the ring form structure, be mounting hole 31 in the middle of the ring upper portion, the ring lower part is provided with recess II 32, the inboard hole 33 that forms in ring lower part, 3 ring external diameters of outer gland are the same with the gland external diameter, guarantee that the same circularity tolerance of the claw shape outer arc face of gland 5 and 5 ring excircles of gland meets the requirements. The mounting hole 31 is sleeved outside the screw rod 15 of the clamp main core 1, and the inner diameter of the inner hole 33 is matched with the outer diameter of the inner gland 2, so that the center of the outer gland 3 is superposed with the center of the clamp main core 1, and the gland 5 is ensured to meet the specification. The upper part of the inner hole 33 is in surface contact with the upper part of the conical part 21 of the inner gland 2, so that the inner gland 2 is tightly matched with the outer gland 3, and the verticality tolerance of the claw-shaped outer arc surface of the gland 5 and the circular end surface of the gland 5 meets the requirement. The circular concave surface of the groove II 32 extends from the outer side of the middle part of the ring to the inner side of the lower part of the ring, and the concave surface is matched with the circular-arc-shaped claw rib 51 of the gland 5 to cover the gland 5, so that a lathe can machine the claw-shaped outer arc surface of the gland 5.
When the clamp is used, the clamping cylinder 11 of the clamp main core 1 is clamped on a three-jaw chuck of a lathe, the claw rib 51 of the gland 5 is placed outwards on the inner core 14 of the clamp main core 1, the inner gland 2 is inserted into the inner circular hole 52 of the gland 5, the matching hole 22 of the inner gland 2 is inserted into the inner core 14 of the clamp main core 1, the groove II 32 of the outer gland 3 is aligned with the claw rib 51 of the gland 5 and is arranged on the outer side of the gland 5 through the mounting hole 31, the nut 4 is screwed, the outer gland 3 presses the inner gland 2 in the screwing process, the inner gland 2 partially enters the groove I13 of the clamp main core 1, the conical surface 21 of the inner gland 2 is tightly matched with the inner circular hole 52 of the gland 5, the center of the inner circular hole 52 of the gland 5 is forced to coincide with the center of the three-jaw chuck of the lathe, and finally the lathe is started to mechanically process the claw-shaped arc surface of the gland 5.
Example 2
Example 2 is essentially the same as example 1 with the improvement that: the nut 4 is an M24 nut which meets the GB/T6170-2000-1 standard, so that the whole clamp is more tightly combined and is not easy to loosen during mechanical processing.
Example 3
Example 3 is essentially the same as example 2 with the improvement that: the unilateral clearance between the matching hole 22 of the inner gland 2 and the inner core 14 of the clamp main core 1 is 0.02-0.05 mm, so that the precision is ensured to be accurate and the clamp is easy to mount and dismount.
The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.
Claims (10)
1. The utility model provides a gland machining special fixture which characterized in that: the clamp comprises a clamp main core (1), an inner gland (2), an outer gland (3) and a nut (4), wherein the nut (4) is matched and connected with a screw rod (15) of the clamp main core (1), and the inner gland (2) and the outer gland (3) are locked between the nut (4) and the clamp main core (1).
2. The special clamp for gland machining according to claim 1, characterized in that: the clamp is characterized in that the bottom of the main core (1) of the clamp is a clamping cylinder (11), a flange (12) is arranged on the upper portion of the clamping cylinder (11), an inner core (14) is connected to the center of the upper portion of the flange (12), an annular groove I (13) is formed in the periphery of the inner core (14) on the upper portion of the flange (12), and a screw rod (15) is connected to the upper portion of the inner core (14).
3. The special clamp for gland machining according to claim 2, characterized in that: the longitudinal section of the groove I (13) is quadrilateral, two side faces of the groove I (13) are inclined planes which are parallel to each other, and the inclined plane of the groove I (13) close to one side of the inner core (14) extends to the lower part of the inner core (14).
4. The special clamp for gland machining according to claim 1, characterized in that: interior gland (2) be the ring form structure, interior gland (2) one end is toper portion (21), the other end is the ring portion, the ring inboard is mating holes (22).
5. The special clamp for gland machining according to claim 2, characterized in that: the inner core (14) of the clamp main core (1) penetrates through the matching hole (22) of the inner gland (2).
6. The special clamp for gland machining according to claim 4, characterized in that: the conical part (21) of the inner gland (2) is inserted into the groove I (13) of the clamp main core (1).
7. The special clamp for gland machining according to claim 1, characterized in that: the outer gland (3) is of a circular ring-shaped structure, the middle of the upper portion of the circular ring is provided with a mounting hole (31), the lower portion of the circular ring is provided with a groove II (32), and an inner hole (33) is formed in the inner side of the lower portion of the circular ring.
8. The special clamp for gland machining according to claim 7, characterized in that: and the mounting hole (31) of the outer gland (3) is sleeved outside the screw (15) of the clamp main core (1).
9. The special clamp for gland machining according to claim 7, characterized in that: the inner diameter of an inner hole (33) at the lower part of the outer gland (3) is matched with the outer diameter of the inner gland (2), and the upper part of the inner hole (33) is in surface contact with the upper part of the conical part (21) of the inner gland (2).
10. The special clamp for gland machining according to claim 7, characterized in that: the circular concave surface of the groove II (32) extends from the outer side of the circular ring to the inner side of the lower part of the circular ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921218500.7U CN210306901U (en) | 2019-07-29 | 2019-07-29 | Special clamp for gland machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921218500.7U CN210306901U (en) | 2019-07-29 | 2019-07-29 | Special clamp for gland machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210306901U true CN210306901U (en) | 2020-04-14 |
Family
ID=70127040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921218500.7U Active CN210306901U (en) | 2019-07-29 | 2019-07-29 | Special clamp for gland machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210306901U (en) |
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2019
- 2019-07-29 CN CN201921218500.7U patent/CN210306901U/en active Active
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