CN214769035U

CN214769035U - Bidirectional-linkage hollow pipe tool clamp

Info

Publication number: CN214769035U
Application number: CN202120501779.0U
Authority: CN
Inventors: 胡凯; 王晨; 孔吉林; 张锡淼
Original assignee: Shanghai Liancheng Group Co Ltd
Current assignee: Shanghai Liancheng Group Co Ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-11-19
Anticipated expiration: 2031-03-09

Abstract

The application discloses hollow pipe frock clamp of two-way linkage includes: the device comprises a first chuck, a second chuck, a bracket and an adjusting rod; the first chuck and the second chuck respectively comprise a plurality of radially movable support parts, and the adjusting rod is configured to enable the support parts on the first chuck and the second chuck to simultaneously expand or contract for radially supporting the inner wall of the hollow pipe. The bidirectional-linkage hollow pipe tool clamp can fix a workpiece in multiple directions, and meets the clamping requirements of parts; the clamping jaws on the chucks on the two sides can realize synchronous diameter changing under the adjustment of the adjusting rod, complete one-time clamping on the workpiece, and have high efficiency and precision; the fixture is suitable for sleeve parts with different sizes, and a tool clamp is manufactured without independently opening a die; and the clamping of the asymmetric sleeve part is realized.

Description

Bidirectional-linkage hollow pipe tool clamp

Technical Field

The application relates to the technical field of machining, in particular to a hollow pipe tool clamp capable of achieving bidirectional linkage.

Background

Hollow tubular parts are often machined in a lathe, such as a stainless steel rolled sleeve. The clamping force of a conventional lathe clamp (such as a common clamp such as a three-jaw chuck inherent to a lathe) on a sleeve part is difficult to control, over-tight clamping deformation or loose clamping is often caused, a longer sleeve is difficult to keep clamping due to a far center of gravity position, a supporting clamp needs to be additionally arranged at the other end, two-end machining cannot be completed at one time, and the final finish machining size of the part cannot meet the requirement. Further, as the size of the sleeve is various, as shown in fig. 1, the length L and the diameter D of the sleeve vary as required, and if a matched fixture tool is designed for each specification of the sleeve, the number of tools is too large, which wastes resources. Therefore, a special tool clamp is designed, and the special tool clamp is suitable for sleeve parts with different specification parameters or similar clamping requirements.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a hollow pipe frock clamp of two-way linkage, realizes the sleeve part of not unidimensional, structure tight with firm, guarantees the precision of part clamping. The utility model discloses can also the asymmetric sleeve part in clamping both ends.

The application discloses hollow pipe frock clamp of two-way linkage includes: the device comprises a first chuck, a second chuck, a bracket and an adjusting rod;

the first chuck and the second chuck respectively comprise a plurality of radially movable support parts, and the adjusting rod is configured to enable the support parts on the first chuck and the second chuck to simultaneously expand or contract for radially supporting the inner wall of the hollow pipe.

In a preferred embodiment, the first chuck is connected with a left shaft, a left moving control is connected to the outer wall of the left shaft, the left moving control is connected to a support member arranged in the radial guide groove of the first chuck through a connecting rod, and when the left shaft and the left moving control move relatively, the left moving control drives the support member to move in the radial guide groove of the first chuck;

the second chuck is connected with the right shaft, the outer wall of the right shaft is connected with a right moving control, the right moving control is connected to a supporting part arranged in the radial guide groove of the second chuck through a connecting rod, and when the right shaft moves relative to the right moving control, the right moving control drives the supporting part to move in the radial guide groove of the second chuck.

Preferably, the link and the support member are each connected by a pin.

In a preferred embodiment, the left movement control and the right movement control are nut-like structures.

In a preferred example, the left shaft and the thread of the left moving control form a threaded fit A, the right shaft and the thread of the right moving control form a threaded fit B, and the rotation directions of the threaded fit A and the threaded fit B are opposite.

In a preferred embodiment, when the adjusting rod is inserted into the clamp, the first end of the adjusting rod is in splined connection with the left shaft, and the matching position of the adjusting rod and the right shaft is also in splined connection.

In a preferred embodiment, the support member has an elongated groove portion into which the moving portion is detachably fitted, the moving portion being adjustable in position in the radial direction.

In a preferred embodiment, the elongated groove portion of the support member is screwed to the moving portion by a bolt.

In a preferred embodiment, the support member is a slider.

In a preferred embodiment, the first end of the first chuck has a boss for coupling with lathe jaws.

In a preferred embodiment, the second end of the second chuck is connected to the bracket via a bracket bearing.

The bidirectional linkage hollow pipe tool clamp at least has the following beneficial effects:

1. the clamping is reliable: the chuck is provided with a plurality of sliding blocks for fixing the workpiece in multiple directions, so that the clamping requirement of the part is met;

2. the synchronism is high: a plurality of jack catchs on the chuck of both sides can realize synchronous reducing under the regulation of adjusting the pole, accomplish disposable clamping to the work piece, and efficiency and precision are high.

3. The number of the sliding blocks is adjusted according to the size and the structure of the part, so that the use of the fixture is adjusted, the fixture is suitable for sleeve parts with different sizes, and a tool fixture is manufactured without independently opening a die;

4. and clamping of the asymmetric sleeve part is realized.

Drawings

FIG. 1 is a schematic view of a sleeve part to be machined according to a first embodiment of the present application

FIG. 2 is a schematic diagram of a bi-directional linkage hollow pipe work fixture according to the present application

FIG. 3 is a schematic view of a bi-directional linkage hollow pipe work fixture according to the present application

FIG. 4 is a schematic view of a sleeve part to be machined according to a second embodiment of the present application

FIG. 5-A is a schematic view of a slider according to a first embodiment of the present application

FIG. 5-B is a schematic view of a slider according to a second embodiment of the present application

FIG. 6 is a schematic view of a slider according to a second embodiment of the present application

FIG. 7 is a schematic view of a bi-directional linkage hollow pipe tool clamp according to a second embodiment of the present application

Description of reference numerals:

1-lathe jack catch

2-left chuck

3-sliding block

31-moving part

32-bolt

4-connecting rod

5-left axis

6-left nut

7-adjusting rod

8-Right axis

9-Right nut

10-Right chuck

11-bracket bearing

12-bracket

13-lathe guide rail

14-Right bearing

15-sleeve

16-left bearing

17-locking device

Detailed Description

In the following description, numerous technical details are set forth in order to provide a better understanding of the present application. However, it will be understood by those skilled in the art that the technical solutions claimed in the present application may be implemented without these technical details and with various changes and modifications based on the following embodiments.

As used herein, the term "the utility model discloses a hollow tubular product frock clamp of two-way linkage", "the utility model discloses a frock clamp", "anchor clamps" interchangeable use, indicate frock clamp.

The following outlines some of the innovative points of the embodiments of the present application:

as shown in fig. 2 to fig. 3, the reference numerals 2 to 16 (except 13 and 15) constitute the bidirectional-linkage hollow pipe work fixture of the present invention. The bidirectional linkage hollow pipe tool clamp comprises a left chuck 2 (namely a first chuck), a right chuck 10 (namely a second chuck), a bracket 12 and an adjusting rod 7. The left side (i.e., the first side) of the left chuck 2 has a boss for being gripped by lathe jaws; the right side (namely the second side) end surface of the left chuck 2 is provided with a plurality of radial guide grooves (the value range of the number n of the guide grooves is more than or equal to 6 and less than or equal to 12), and the slide block 3 is arranged in the guide grooves and can freely slide along the radial direction of the guide grooves. The tip of slider 3 is equipped with the connecting hole for carry out pin joint with the first end of connecting rod 4, and the second end and the left nut 6 of connecting rod 4 are connected, and first end, the second end of connecting rod 4 all can rotate around its pivot. The left end (i.e., the first end) of the left shaft 5 is engaged with the left chuck 2 through a left bearing 16; an external thread structure is arranged on the outer circumferential wall of the left shaft 5 near the right end (namely the second end), an internal thread is arranged on the inner circle of the left nut 6, and the threads of the left shaft 5 and the left nut 6 form a thread matching A.

Similarly, a radial guide groove (the number and the size of which are consistent with those of the radial guide groove on the left chuck 2) is formed on the left side (namely, the first side) end surface of the right chuck 10 (namely, the second chuck), and the slide block 3 is installed in the radial guide groove and can freely slide along the radial direction of the guide groove. The end of the sliding block 3 is provided with a connecting hole for connecting the second end of the connecting rod 4, the first end of the connecting rod 4 is connected with the right nut 9, and the first end and the second end of the connecting rod 4 can rotate around the rotating shaft thereof. The right end (i.e., the second end) of the right shaft 8 is engaged with the right chuck through a right bearing 14; an external thread structure is arranged on the outer circumferential wall of the right shaft 8 close to the left end (namely the first end), an internal thread is arranged on the inner circle of the right nut 9, and the threads of the right shaft 8 and the right nut 9 form a thread matching B; the screwing directions of the thread matching A and the thread matching B are opposite.

The right side (i.e. the second side) of the right chuck 10 has a boss structure, on which a carriage bearing 11 is mounted, an outer ring of the carriage bearing 11 is coupled with a mating carriage 12, and a bottom of the carriage 12 is mounted on a lathe rail 13 and can be horizontally moved and fixed along the lathe rail 13. The adjustment rod 7 passes through the bracket 12 and the hollow inner cavity of the right shaft 8. The left end (i.e. the first end) of the adjusting rod 7 is provided with a hexagonal or square spline structure, and a groove corresponding to the spline at the right end of the left shaft 5 forms a matching C; a hexagonal or square spline structure is provided near the area where the adjustment lever 7 engages with the right shaft 8, and a groove corresponding to the spline of the inner race of the right shaft 8 forms an engagement D. The right end of the adjusting rod 7 is provided with a handle 71.

In another embodiment, the present application may be used to machine hollow tubing with asymmetric ends, such as the sleeve shown in FIG. 4. As shown in fig. 5-a to 5-B, fig. 6, the slider 3 is modified. The modified slide block 3 has a threaded hole, the detachable moving part 31 has an elongated groove part, so that the moving part 31 is fitted to the slide block 3 by a bolt 32 and is adjustable in position in the vertical direction, and the modified slide block 3 can support hollow pipes having different inner diameters.

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Example 1

The two-way linkage hollow pipe tool clamp is used for processing a sleeve with two symmetrical ends as shown in figure 1. The diameter of the excircle at the two ends of the sleeve is D, the length of the sleeve is L, the length of a section needing further mechanical finishing is M, the size of an inner hole of the sleeve is D, and the wall thickness of the sleeve is delta. Generally, D is 200 to 500mm, L is 80 to 1800mm, M is 10 to 15mm, and the thickness δ is 2 to 3 mm. In use, as shown in fig. 2, the operator pulls the adjusting rod 7 out of the tooling fixture, and adjusts the bracket 12 to the right, so that the bracket 12 moves a certain distance to the right along the lathe guide rail 13, and the sleeve 15 can be smoothly placed on the tooling fixture. After the sleeve is installed on the tool clamp, the position of the bracket 12 is adjusted back to the left to perform primary positioning, so that the left end face of the sleeve 15 is aligned with the slider 3 on the left chuck 2, and the right end face of the sleeve 15 is aligned with the slider 3 on the right chuck 10. And fixing the position of the bracket 12 on the lathe guide rail 13 to complete the axial clamping of the sleeve 15. Then, the adjusting rod 7 passes through the bracket 12 and the right shaft 8 and is inserted into a spline groove at the right end of the left shaft 5, the handle 7-1 is rotated, and the left shaft 5 and the right shaft 8 are simultaneously rotated through the matching C and the matching D of the spline structure. The thread matching A and B on the left shaft 5 and the right shaft 8 drive the left nut 6 and the right nut 9 to move simultaneously. The movement of the left nut 6 and the right nut 9 is either simultaneous movement towards each other (i.e. towards each other) or simultaneous movement in reverse (i.e. away from each other). The movement process is as follows: when the left nut 6 moves leftwards, the connecting rod 4 contracts, and under the action of the connecting rod 4, the sliding block 3 on the left chuck 2 is driven to move outwards along the radial direction to support the left inner wall of the sleeve 15; meanwhile, when the right shaft 8 moves rightwards, the connecting rod 4 contracts, and under the action of the connecting rod 4, the sliding block 3 on the right chuck 10 is driven to move outwards along the radial direction, so that the inner wall of the right side of the sleeve 15 is supported, and the radial clamping of the two ends of the sleeve 15 is completed. Through locking device 17, make adjust pole 7 and right chuck 10 and accomplish the displacement locking, reach the purpose of fixed adjustment pole 7, make adjust pole 7 static relative right chuck 10, start the lathe, under the drive of lathe jack catch 1, left chuck 2 rotates, through adjusting pole 7 transmission moment of torsion, to right chuck 10, carries out synchronous revolution, just can carry out lathe work.

After turning is finished, the locking device 17 is opened, the fixing of the adjusting rod 7 is unlocked, the handle 7-1 is rotated reversely, the sliding blocks 3 on the two sides move inwards, the radial clamping of the sleeve 15 is loosened, the adjusting rod 7 is pulled out, the adjusting bracket 12 moves rightwards, the axial clamping of the sleeve 15 is loosened, and finally the part sleeve 15 is taken down to finish one-time processing.

Example 2

If the two ends of the workpiece to be machined are asymmetrical, i.e. the inner diameters are not of uniform size, the modified slider 3 according to the present invention can be used, and the modified workpiece holder can satisfy the clamping of such parts.

The two-way linkage hollow pipe tool clamp is used for machining sleeves with two symmetrical end parts as shown in figure 4. The inner diameters of the two ends of the sleeve are d1 and d2 respectively. Keeping the original structure unchanged, modifying the structure of the sliding block, designing the sliding block into an adjustable structure, and modifying the sliding block before and after modification, such as the steps shown in figures 5-A and 5-B: the modified slider 3 has a threaded hole, and the detachable moving portion 31 has an elongated groove portion so that the moving portion 31 is fitted to the slider 3 by a bolt 32 and is adjustable in position in the radial direction.

The difference between the meters d1 and d2 is Δ. The moving parts 31 on the left chuck 2 and the slide blocks 3 of the right chuck 10 are adjusted so that the difference between the slide block displacements of the left and right chucks is 0.5 delta in the radial direction to meet the clamping requirement, and the adjustment schematic diagram 7 of the clamp is completed.

The operator will adjust pole 7 and take out from frock clamp, adjust bracket 12 to the right, make bracket 12 move certain distance along lathe guide rail 13 to the right for can place sleeve 15 smoothly into on frock clamp, according to the part size, adjust the displacement difference of removal portion 31 on slider 3 and be 0.5 delta, and accomplish the fastening through bolt 32. After the sleeve is installed on the tool clamp, the position of the bracket 12 is adjusted back to the left to perform primary positioning, so that the left end face of the sleeve 15 is aligned with the slider 3 on the left chuck 2, and the right end face of the sleeve 15 is aligned with the slider 3 on the right chuck 10. And fixing the position of the bracket 12 on the lathe guide rail 13 to complete the axial clamping of the sleeve 15. Then, the adjusting rod 7 passes through the bracket 12 and the right shaft 8 and is inserted into a spline groove at the right end of the left shaft 5, the handle 7-1 is rotated, and the left shaft 5 and the right shaft 8 are simultaneously rotated through the matching C and the matching D of the spline structure. The thread matching A and B on the left shaft 5 and the right shaft 8 drive the left nut 6 and the right nut 9 to move simultaneously. The movement of the left nut 6 and the right nut 9 is either simultaneous movement towards each other (i.e. towards each other) or simultaneous movement in reverse (i.e. away from each other). The movement process is as follows: when the left nut 6 moves leftwards, the connecting rod 4 contracts, and under the action of the connecting rod 4, the sliding block 3 on the left chuck 2 is driven to move outwards along the radial direction to support the left inner wall of the sleeve 15; meanwhile, when the right shaft 8 moves rightwards, the connecting rod 4 contracts, and under the action of the connecting rod 4, the sliding block 3 on the right chuck 10 is driven to move outwards along the radial direction, so that the inner wall of the right side of the sleeve 15 is supported, and the radial clamping of the two ends of the sleeve 15 is completed. Through locking device 17, make adjust pole 7 and right chuck 10 and accomplish the displacement locking, reach the purpose of fixed adjustment pole 7, make adjust pole 7 static relative right chuck 10, start the lathe, under the drive of lathe jack catch 1, left chuck 2 rotates, through adjusting pole 7 transmission moment of torsion, to right chuck 10, carries out synchronous revolution, just can carry out lathe work.

It is noted that, in the present patent application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element. In the present patent application, if it is mentioned that a certain action is executed according to a certain element, it means that the action is executed according to at least the element, and two cases are included: performing the action based only on the element, and performing the action based on the element and other elements. The expression of a plurality of, a plurality of and the like includes 2, 2 and more than 2, more than 2 and more than 2.

This specification includes combinations of the various embodiments described herein. Separate references to "one embodiment" or a particular embodiment, etc., do not necessarily refer to the same embodiment; however, these embodiments are not mutually exclusive, unless indicated as mutually exclusive or as would be apparent to one of ordinary skill in the art. It should be noted that the term "or" is used in this specification in a non-exclusive sense unless the context clearly dictates otherwise.

All documents mentioned in this application are to be considered as being incorporated in their entirety into the disclosure of this application so as to be subject to modification as necessary. Further, it is understood that various changes or modifications may be made to the present application by those skilled in the art after reading the above disclosure of the present application, and such equivalents are also within the scope of the present application as claimed.

Claims

1. The utility model provides a hollow pipe frock clamp of two-way linkage which characterized in that includes: the device comprises a first chuck, a second chuck, a bracket and an adjusting rod;

2. The bi-directional linkage hollow pipe tool clamp of claim 1, wherein the first chuck is connected with a left shaft, a left moving control is connected to the outer wall of the left shaft, the left moving control is connected to a support member disposed in a radial guide groove of the first chuck through a connecting rod, and when the left shaft and the left moving control move relatively, the left moving control drives the support member to move in the radial guide groove of the first chuck;

3. The bi-directional hollow pipe work fixture of claim 2, wherein the left and right movement controls are nut-like structures.

4. The bi-directional linkage hollow pipe tool clamp of claim 3, wherein the left shaft and the threads of the left moving control form a thread fit A, the right shaft and the threads of the right moving control form a thread fit B, and the rotation directions of the thread fit A and the thread fit B are opposite.

5. The bi-directional linkage hollow pipe tool clamp of claim 2, wherein when the adjusting rod is inserted into the clamp, a first end of the adjusting rod is in splined connection with the left shaft, and a matching position of the adjusting rod and the right shaft is also in splined connection.

6. The bidirectionally-linked hollow pipe tool fixture of claim 1, wherein the support member has an elongated groove portion, the moving portion is detachably fitted into the elongated groove portion, and the position of the moving portion in the radial direction is adjustable.

7. The bi-directional linkage hollow pipe tool clamp of claim 6, wherein the elongated groove portion of the support member is in threaded connection with the moving portion through a bolt.

8. The bi-directional hollow pipe work fixture of claim 1, wherein the support member is a slider.

9. The bi-directional hollow pipe work fixture of claim 1, wherein the first chuck has a boss at a first end for connection to a lathe jaw.

10. The bi-directional hollow pipe work fixture of claim 1, wherein the second end of the second chuck is coupled to the bracket via a bracket bearing.