CN115070638A - Workpiece support rod, workpiece support device and workpiece support method - Google Patents

Abstract

The invention discloses a workpiece supporting rod, a workpiece supporting device and a workpiece supporting method. The invention can realize reliable and flexible installation of the workpiece and meet the requirement of workpiece processing.

Description

Workpiece support rod, workpiece support device and workpiece support method

Technical Field

The invention belongs to the field of workpiece clamping, and particularly relates to a workpiece supporting rod, a workpiece supporting device and a workpiece supporting method.

Background

During machining, the clamp is basically used, and common clamps such as a vice, a chuck and the like are used for clamping and positioning a workpiece to be machined.

However, the existing clamping mode is single, the clamping effect cannot be finished on some complex workpieces, the complex process requirements of workpiece processing cannot be met, and the complex position adjustment and positioning of the workpiece to be processed are inconvenient to carry out. Along with the development of intelligent processing equipment, the requirement of workpiece clamping can not be satisfied more in the existing workpiece clamping.

Disclosure of Invention

The invention aims to provide a workpiece supporting rod, a workpiece supporting device and a workpiece supporting method.

The invention provides a workpiece supporting rod which comprises a main supporting rod and two fixed seats, wherein the main supporting rod comprises at least two sections of branch supporting rods, at least two branch supporting rods are connected, the first end of the main supporting rod is movably connected with a first fixed seat through a rotating shaft, and the second end of the main supporting rod is also movably connected with a second fixed seat through a rotating shaft.

In one embodiment, the branch stay bar comprises a branch bar body and a connecting seat, the outer end of the branch bar body is provided with an end head, the connecting seat is provided with a first connecting hole and a first locking hole, the first connecting hole is formed in the end part of the connecting seat, the first locking hole is formed in the side part of the connecting seat, and the first connecting hole and the first locking hole are communicated inside the connecting seat; and one end of the end head is arranged in the first connecting hole, and the first locking piece is arranged in the first locking hole and is matched with the end head in the first connecting hole, and the end head is locked with the connecting seat.

In one embodiment, the number of the first locking holes formed in each connecting seat is at least two, the two first locking holes are respectively formed in two opposite sides of the connecting seat, and the first locking pieces in the first locking holes on two sides are respectively locked from two sides of the end head.

In one embodiment, a convex locking tooth is arranged on the end head, a concave locking tooth is arranged on the first locking element, and the convex locking tooth of the end head is matched with the concave locking tooth of the first locking element and locks the end head.

In one embodiment, the fixing base further comprises a second connecting piece, the fixing base is provided with a second connecting hole and a second lock hole, the second connecting hole is formed in the end portion of the fixing base, the second lock hole is formed in the side portion of the fixing base, and the second connecting hole is communicated with the second lock hole in the fixing base; one end of the second connecting piece is arranged in the second connecting hole, and the second locking piece is arranged in the second locking hole and matched with the second connecting piece in the second connecting hole, and the second connecting piece is locked with the fixed seat.

In one embodiment, the split-type support device further comprises a ring sleeve, wherein an external thread is arranged at the connecting end of the first split-support rod, the connecting end of the second split-support rod is hollow, the ring sleeve is arranged at the connecting end of the second split-support rod, an internal thread is arranged in the middle of the ring sleeve, the connecting end of the first split-support rod is inserted into the connecting end of the second split-support rod, the internal thread is matched with the external thread, and a circumferential fixing device is arranged between the ring sleeve and the second split-support rod.

In one embodiment, the circumferential fixing device comprises an outer sleeve body and a circumferential limiting member, wherein the outer sleeve body is fixedly connected with the ring sleeve through a connecting nail; the end part of the second branch supporting rod connecting end is provided with a limiting flange, one end of the outer sleeve body, which is opposite to the limiting flange, is provided with a neck part, the neck part of the outer sleeve body is sleeved at the end part of the second branch supporting rod and axially limits the limiting flange, and the outer sleeve body is limited by a circumferential limiting part.

In one embodiment, the circumferential limiting member comprises a sliding sleeve and a fixing pin, the sliding sleeve is sleeved on the second one of the branch support rod connecting ends, the end of the sliding sleeve is opposite to the end of the outer sleeve body, a first meshing part is arranged at the end of the sliding sleeve, a second meshing part is arranged at the end of the outer sleeve body, the first meshing part is matched with the second meshing part, and the fixing pin is installed between the sliding sleeve and the second one of the branch support rods; and a first circumferential limiting part is arranged on the circumferential outer side of the second sub-support rod connecting end, a second circumferential limiting part is arranged on the circumferential inner side of the sliding sleeve, and the first circumferential limiting part is matched with the second circumferential limiting part.

In one embodiment, the first engaging part and the second engaging part are concave-convex teeth.

In one embodiment, the first circumferential limiting part is an outer positioning surface arranged on the circumferential outer side of the second sub-support rod, the outer positioning surface extends along the longitudinal direction of the sub-support rod, the second circumferential limiting part is an inner positioning surface arranged on the inner wall of the sliding sleeve, and the outer positioning surface and the inner positioning surface are in sliding fit along the longitudinal direction of the second sub-support rod.

In one embodiment, a limiting ring is sleeved on the second branch supporting rod, and the limiting ring is positioned at the side part of the sliding sleeve and limits the sliding sleeve.

The invention also provides a workpiece supporting device which comprises a working table, a workpiece to be processed, at least two supporting columns and the workpiece supporting rod, wherein the lower part of the workpiece to be processed is arranged on the working table through the at least two supporting columns, one end of the workpiece supporting rod is connected with the side part of the workpiece to be processed, and the other end of the workpiece supporting rod is connected with the working table.

In one embodiment, the supporting column comprises splicing bodies, a third connecting hole and a third locking hole are arranged in each splicing body, the third connecting hole is arranged at the end part of each splicing body, the third locking hole is arranged at the side part of each splicing body, and the third connecting hole is communicated with the third locking hole in the splicing bodies; one end of the third connecting piece is arranged in the third connecting hole, the third locking piece is arranged in the third locking hole, and the third locking piece is matched with the third connecting piece in the third connecting hole and locks the third connecting piece and the splicing body.

The invention also provides a workpiece supporting method,

mounting the lower part of a workpiece to be processed on a working table surface through a support column;

connecting the first branch supporting rod with the working table top through a fixed seat at the end part of the first branch supporting rod, and connecting the second branch supporting rod with the side part of the workpiece to be processed through a fixed seat at the end part of the second branch supporting rod;

and butting the first branch supporting rod with the second branch supporting rod to realize the fixation of the workpiece to be processed.

The technical scheme provided by the invention has the following advantages and effects:

the two ends of the main support rod of the workpiece support rod are movably connected with the fixed seat, so that the angle of the main support rod can be adjusted relative to the fixed seat, and a workpiece to be machined can be conveniently and flexibly fixed on the working table; moreover, the main support rod adopts a sectional structure, when a workpiece is clamped, the clamping and fixing modes are various, the branch support rods can be connected firstly, then the two ends of the workpiece support rod are respectively fixed with the workpiece to be processed and the working table top, or the branch support rods at the two ends are respectively fixed with the workpiece to be processed and the working table top, and then the multi-section branch support rods are connected; the clamping mode of the workpiece to be processed is more flexible.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles and effects of the invention.

Unless otherwise specified or defined, the same reference numerals in different figures refer to the same or similar features, and different reference numerals may be used for the same or similar features.

FIG. 1 is a perspective view of the workpiece support apparatus in an embodiment of the invention;

FIG. 2 is a top view of the workpiece support apparatus in an embodiment of the invention;

FIG. 3 is a side view of the workpiece support apparatus in an embodiment of the invention;

FIG. 4 is a side cross-sectional view of the workpiece support apparatus in an embodiment of the invention;

FIG. 5 is a side exploded view of the workpiece support apparatus in an embodiment of the invention;

FIG. 6 is a cross-sectional view of the workpiece support bar connection in an embodiment of the present invention;

FIG. 7 is a cross-sectional view of the connection of two sub-struts according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of the workpiece support rod end connection in an embodiment of the invention;

FIG. 9 is a structural view of a second spreader lever in accordance with an embodiment of the present invention;

FIG. 10 is a schematic diagram of a second connector and a third connector according to an embodiment of the present invention;

FIG. 11 is a block diagram of a stop collar according to an embodiment of the present invention;

FIG. 12 is a view showing the configuration of a first side of an outer casing in the embodiment of the present invention;

FIG. 13 is a view of the second side of the outer casing according to the embodiment of the present invention;

FIG. 14 is a block diagram of a first side of the sleeve in an embodiment of the present invention;

FIG. 15 is a block diagram of a second side of the sleeve in accordance with an embodiment of the present invention;

FIG. 16 is an exploded view of the end connection of the support rods in an embodiment of the present invention;

FIG. 17 is a block diagram of the first locking element/second locking element/third locking element in an embodiment of the present invention;

FIG. 18 is a schematic diagram of a connecting base according to an embodiment of the present invention;

FIG. 19 is a structural view of a fixing base in the embodiment of the present invention;

FIG. 20 is a structural view of a support column in an embodiment of the present invention;

description of reference numerals:

11. a workpiece to be processed, 12, a working table surface, 13, a pressing block, 131, a nail hole, 14, a locking nail, 15, a convex locking tooth, 16, a concave locking tooth, 17, a positioning block, 18 and a threaded end,

20. a supporting column, 21, a splicing body, 211, a third connecting hole, 212, a third locking hole, 22, a third connecting piece, 23, a third locking piece,

30. the workpiece supporting rod 301, the main supporting rod 31, the branch supporting rod 311, the branch rod body 3111, the end head 312, the connecting seat 3121, the first connecting hole 3122, the first locking hole 3123, the first locking piece 313, the connecting lug 314 and the shaft hole,

32. a fixed seat 321, a rotating shaft 322, a second connecting piece 323, a second connecting hole 324, a second locking hole 325, a second locking piece 33 and a fixing screw,

41. the sleeve comprises a ring sleeve body, 411, internal threads, 412, a connecting nail, 42, external threads, 43, an outer sleeve body, 44, a sliding sleeve body, 441, a fixing pin, 45, a limiting ring, 451, a limiting nail, 461, a limiting flange, 462, a neck portion, 471, a first meshing portion, 472, a second meshing portion, 481, an outer positioning surface, 482 and an inner positioning surface.

Detailed Description

In order to facilitate an understanding of the invention, specific embodiments thereof will be described in more detail below with reference to the accompanying drawings.

Unless specifically stated or otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the case of a real-world scenario incorporating the technical solution of the present invention, all technical and scientific terms used herein may also have meanings corresponding to the purpose of achieving the technical solution of the present invention.

As used herein, unless otherwise specified or defined, "first" and "second" … are used merely to distinguish between names and do not denote a particular quantity or order.

As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items, unless specified or otherwise defined.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present.

As used herein, unless otherwise specified or defined, the terms "comprises," "comprising," and "comprising" are used interchangeably to refer to the term "comprising," and are used interchangeably herein.

It is needless to say that technical contents or technical features which are contrary to the object of the present invention or clearly contradicted by the object of the present invention should be excluded.

As shown in fig. 1 to 20, the workpiece supporting device includes a working table 12, a workpiece 11 to be processed, two supporting columns 20 and a workpiece supporting rod 30, wherein the lower portion of the workpiece 11 to be processed is mounted on the working table 12 through the two supporting columns 20, one end of the workpiece supporting rod 30 is connected with the side portion of the workpiece 11 to be processed, and the other end is connected with the working table 12.

Support column 20

The structure of the supporting column 20 is mainly shown by combining fig. 5 and fig. 20, and includes a splicing body 21, wherein a third connecting hole 211 and a third lock hole 212 are respectively formed in the splicing body 21, the third connecting hole 211 is formed in an end portion of each splicing body 21, the third lock hole 212 is formed in a side portion of each splicing body 21, and the third connecting hole 211 and the third lock hole 212 are communicated with each other inside the splicing body 21; one end of the third connecting piece 22 is installed in the third connecting hole 211, the third locking piece 23 is installed in the third locking hole 212, and the third locking piece 23 and the third connecting piece 22 are matched in the third connecting hole 211 and lock the third connecting piece 22 and the splicing body 21.

In this embodiment, when one splicing body 21 is used for connection, the splicing body 21 can be connected with the workpiece 11 to be processed and the working table 12 through a third connecting piece 22; the number of the splicing bodies 21 in the supporting column 20 can be selected and set according to the clamping height of the workpiece, and when a plurality of splicing bodies 21 are adopted, the connection between two adjacent splicing bodies 21 is connected by adopting the connection mode.

Workpiece support rod 30

The structure of the workpiece supporting rod 30 is as shown in fig. 6 to 19, and the workpiece supporting rod 30 includes a main supporting rod 301 and two fixing seats 32, the main supporting rod 301 includes two segments of sub supporting rods 31, each sub supporting rod 31 includes a sub rod body 311 and a connecting seat 312, both outer ends of the sub rod body 311 are provided with end heads 3111, the end head 3111 of the sub rod body 311 is connected with the connecting seat 312, the connecting seat 312 is provided with two connecting lugs 313, the fixing seats 32 are provided with one connecting lug 313, the connecting lugs are provided with shaft holes 314, after a rotating shaft 321 passes through the shaft holes 314, both ends of the main supporting rod 301 are movably connected with the two fixing seats 32, and the fixing seat 32 at the lower part is connected with the working table 12; the upper fixing base 32 is connected with the workpiece 11 to be machined.

Connection of rod body and end 3111

The connection structure between the head 3111 and the connection seat 312 is as follows:

the connecting seat 312 is provided with a first connection hole 3121 and two first locking holes 3122, the two first locking holes 3122 are respectively disposed on two opposite sides of the connecting seat 312, the first connection hole 3121 is disposed at an end of the connecting seat 312, the first locking hole 3122 is disposed at a side of the connecting seat 312, and the first connection hole 3121 and the first locking hole 3122 are communicated inside the connecting seat 312; one end of the head 3111 is installed in the first connection hole 3121, the two first locking members 3123 are installed in the first locking hole 3122 from two sides, respectively, a convex locking tooth 15 is disposed on the head 3111, a concave locking tooth 16 is disposed on the first locking member 3123, the convex locking tooth 15 of the head 3111 is matched with the concave locking tooth 16 of the first locking members 3123 on two sides, and the head 3111 is locked.

Connection between the holder 32 and the work surface 12 or the workpiece 11 to be machined

The fixing seat 32 is provided with a second connecting hole 323 and two second locking holes 324, the second locking holes 324 are respectively arranged on two opposite sides of the fixing seat 32, the second connecting hole 323 is arranged at an end of the fixing seat 32, the second locking holes 324 are arranged at a side of the fixing seat 32, and the second connecting hole 323 and the second locking holes 324 are communicated with each other inside the fixing seat 32; one end of the second connecting member 322 is installed in the second connecting hole 323, the second locking member 325 is installed in the second locking hole 324 and is matched with the second connecting member 322 in the second connecting hole 323, and the second locking members 325 in the second locking holes 324 at two sides are respectively locked from two sides of the second connecting member 322.

The second connecting member 322 can be fixedly connected to the working platform 12, and can also be connected to the workpiece 11 to be processed, and by the above structure, the fixing base 32 of the workpiece supporting rod 30 can be quickly connected to the working platform 12, or fixedly connected to the workpiece 11 to be processed. In order to ensure the reliability of the fixed connection between the fixing base 32 and the work table 12, the number of the second connecting members 322 may be increased, and in addition, the reliability of the fixed connection may be increased by the fixing screws 33.

Connection between two part-struts 31

The main stay 301 is provided in segments for two purposes:

firstly, the length of the main supporting rod 301 is adjusted to meet the requirement of the actual position or angle of the workpiece 11 to be processed; moreover, when the workpiece 11 to be processed is installed, due to the adoption of the sectional structure, different connection and installation sequences can be determined as required, the installation and fixing modes are more flexible, and the connection of the two sub-struts 31 is described as follows:

the two sub-support rods 31 are connected through structures such as a ring sleeve 41, an outer sleeve 43, a sliding sleeve 44 and a limiting ring 45, wherein an external thread 42 is arranged at the connecting end of the first sub-support rod 31, the connecting end of the second sub-support rod 31 is hollow, the ring sleeve 41 is arranged at the connecting end of the second sub-support rod 31, an internal thread 411 is arranged in the middle of the ring sleeve 41, the connecting end of the first sub-support rod 31 is inserted into the connecting end of the second sub-support rod 31, and the internal thread 411 is matched with the external thread 42; the outer sleeve 43 is fixedly connected with the ring sleeve 41 through a connecting nail 412; a limiting flange 461 is arranged at the end of the connecting end of the second sub-support rod 31, a neck 462 is arranged at the end of the outer sleeve 43 opposite to the limiting flange 461, the neck 462 of the outer sleeve 43 is sleeved on the end of the second sub-support rod 31 and axially limits the limiting flange 461, the outer sleeve 43 is circumferentially limited by a sliding sleeve 44 and a fixing pin 441, the sliding sleeve 44 is sleeved on the connecting end of the second sub-support rod 31, the end of the sliding sleeve 44 is opposite to the end of the outer sleeve 43, a first engaging portion 471 is arranged at the end of the sliding sleeve 44, a second engaging portion 472 is arranged at the end of the outer sleeve 43 (in this embodiment, the first engaging portion 471 and the second engaging portion 472 are both concave-convex teeth), the first engaging portion 471 is matched with the second engaging portion 472, and the fixing pin 441 is arranged between the sliding sleeve 44 and the second sub-support rod 31; an outer positioning surface 481 is arranged on the circumferential outer side of the connecting end of the second branch strut 31, the outer positioning surface 481 extends along the longitudinal direction of the branch strut 31, an inner positioning surface 482 is arranged on the circumferential inner side of the sliding sleeve 44, and the outer positioning surface 481 is in sliding fit with the inner positioning surface 482 along the longitudinal direction of the second branch strut 31. A limiting ring 45 is further sleeved on the second branch stay 31, and the limiting ring 45 is positioned at the side part of the sliding sleeve 44 and limits the sliding sleeve 44.

The advantages and principles of this structure are described below:

the inner side of the sliding sleeve 44 is provided with an inner positioning surface 482, the outer side of the second branch supporting rod 31 is provided with an outer positioning surface 481, the sliding sleeve 44 can only axially slide and cannot circumferentially rotate, and the outer sleeve body 43 can be reliably circumferentially limited by the sliding sleeve 44. When the two sub-support rods 31 are connected, the external thread 42 at the end of the first sub-support rod 31 is inserted into the hollow part of the second sub-support rod 31, the fixing lock is released, the sliding sleeve 44 is retracted, the outer sleeve 43 and the ring sleeve 41 rotate due to the separation of the first engaging part 471 and the second engaging part 472, the internal thread 411 on the inner wall of the ring sleeve 41 is matched with the external thread 42 at the end of the first sub-support rod 31, the length of the whole support rod is adjusted, after the length of the support rod is adjusted to a certain position, the sliding sleeve 44 is pushed to be aligned with the outer sleeve 43, the first engaging part 471 on the sliding sleeve 44 is engaged with the second engaging part 472, the outer sleeve 43 and the ring sleeve 41 cannot rotate circumferentially, and the length of the whole support rod is fixed.

During length adjustment, the neck 462 of the outer sleeve 43 is locked with the limiting flange 461 at the end of the second sub-supporting rod 31, so that the position of the outer sleeve 43 (and the first sub-supporting rod 31 in threaded connection with the ring sleeve 41) can be locked, the outer sleeve 43 and the ring sleeve 41 are made into a split structure for realizing the installation of the neck 462 and the limiting flange 461, after the installation is finished, the split structure is fixed by the connecting nail 412, the sliding sleeve 44 is positioned by the inner positioning surface 482 and the outer positioning surface 481, circumferential rotation cannot occur, the sliding sleeve can only axially slide and cannot rotate, circumferential angle can be freely adjusted through concave-convex teeth at the end of the sliding sleeve, circumferential limiting reliability can be guaranteed, and flexible angle adjustment can be realized. The limiting ring 45 is arranged on the outer side of the sliding sleeve 44, and after the limiting ring 45 is fixed on the second branch supporting rod 31 through the limiting nail 451, the limiting ring 45 can prevent the sliding sleeve 44 from sliding out.

The second connecting piece 322 is provided with a convex locking tooth 15, the second locking piece 325 is provided with a concave locking tooth 16, and the convex locking tooth 15 of the second connecting piece 322 is matched with the concave locking tooth 16 of the second locking piece 325 and locks the second connecting piece 322. The structure and the locking structure of the third connecting member 22 are the same as those of the second connecting member 322, and are not described herein again.

In this embodiment, each of the first locking element 3123, the second locking element 325 and the third locking element 23 includes a pressing block 13 and a locking pin 14, the concave locking teeth 16 are disposed on the pressing block 13, a pin hole 131 is further disposed on the pressing block 13, and the locking pin 14 penetrates through the pin hole 131 and locks the pressing blocks 13 on both sides.

In this embodiment, when clamping the workpiece 11 to be processed, the following steps may be taken:

1. the first third connecting member 22 is connected to the work table 12, the second third connecting member 22 is connected to the lower portion of the workpiece 11 to be machined,

2. the splicing body 21 is placed between the upper and lower third connecting pieces 22, and is locked by the third locking piece 23, so that the workpiece 11 to be processed is fixed on the worktable surface 12; the number of the splicing bodies 21 can be set according to the processing requirement;

3. connecting the first second connecting piece 322 with the working table 12, and connecting the second connecting piece 322 with the side surface of the workpiece 11 to be processed;

4. the two fixing seats 32 are respectively arranged on the side parts of the working table 12 and the workpiece 11 to be processed, and the two fixing seats 32 are respectively locked through the second locking piece 325, so that the fixing seats 32 are respectively and fixedly connected with the side surfaces of the working table 12 and the workpiece 11 to be processed;

5. preliminarily butting the two sub-struts of the main strut 301;

6. the end head of the lower end of the main supporting rod 301 is inserted into a first connecting hole of a connecting seat 312 on the working table 12 and is locked by a first locking piece; inserting the tip of the upper end of the main supporting rod 301 into the first connecting hole 3121 of the connecting seat 312 at the side of the workpiece 11 to be processed, and locking by the first locking piece 3123;

7. through the aforementioned connection, a basic support of the workpiece 11 to be machined is achieved; rotating the outer sleeve 43 (and the ring sleeve 41) to adjust the length of the main supporting rod 301, thereby adjusting the state of the workpiece 11 to be processed;

8. after the length of the main support lever 301 is adjusted to the proper position, the sliding sleeve 44 is pushed and engaged with the outer casing 43, and the outer casing 43 is locked.

In the embodiment, the locking structures are adopted in the support column, the two connecting seats, the two fixing seats and other structures, and the main support rod is of a sectional structure, so that the clamping sequence is not limited to the above mode.

In this embodiment, the supporting column 20 and the workpiece supporting rod 30 may be made of metal, and the main supporting rod 301 of the workpiece supporting rod 30 may be made of plastic or other materials under the condition of meeting the precision, and in order to meet the matching precision of the positioning block 17, the positioning block 17 may be made of a wear-resistant high-precision material.

The above embodiments are provided to illustrate, reproduce and deduce the technical solutions of the present invention, and to fully describe the technical solutions, the objects and the effects of the present invention, so as to make the public more thoroughly and comprehensively understand the disclosure of the present invention, and not to limit the protection scope of the present invention.

The above examples are not intended to be exhaustive of the invention and there may be many other embodiments not listed. Any alterations and modifications without departing from the spirit of the invention are within the scope of the invention.

Claims (14)

1. The workpiece supporting rod is characterized by comprising a main supporting rod and two fixing seats, wherein the main supporting rod comprises at least two sections of branch supporting rods, at least two branch supporting rods are connected, the first end of the main supporting rod is movably connected with the first fixing seat through a rotating shaft, and the second end of the main supporting rod is also movably connected with the second fixing seat through a rotating shaft.

2. The workpiece support bar of claim 1, wherein the branch bar comprises a branch bar body and a connecting seat, an end of the branch bar body is provided at an outer end of the branch bar body, the connecting seat is provided with a first connecting hole and a first locking hole, the first connecting hole is formed at an end of the connecting seat, the first locking hole is formed at a side of the connecting seat, and the first connecting hole and the first locking hole are communicated with each other inside the connecting seat; one end of the end head is arranged in the first connecting hole, and the first locking piece is arranged in the first locking hole and matched with the end head in the first connecting hole, and locks the end head and the connecting seat.

3. The workpiece support bar of claim 2 wherein there are at least two of said first locking holes in each of said connecting blocks, two of said first locking holes being located on opposite sides of said connecting block, said first locking elements in said first locking holes on both sides being locked from both sides of said tip.

4. The workpiece support bar of claim 3 wherein said tip has convex locking teeth and said first locking element has concave locking teeth, said convex locking teeth of said tip cooperating with said concave locking teeth of said first locking element and locking said tip.

5. The workpiece support bar according to any one of claims 1 to 4, further comprising a second connecting member, wherein the fixing base is provided with a second connecting hole and a second locking hole, the second connecting hole is formed in an end portion of the fixing base, the second locking hole is formed in a side portion of the fixing base, and the second connecting hole and the second locking hole are communicated with each other inside the fixing base; one end of the second connecting piece is arranged in the second connecting hole, and the second locking piece is arranged in the second locking hole and matched with the second connecting piece in the second connecting hole, and the second connecting piece is locked with the fixed seat.

6. The workpiece support bar according to any one of claims 1 to 4 further comprising a collar, wherein the coupling end of a first of said split struts is provided with an external thread, the coupling end of a second of said split struts is hollow, said collar is provided at the coupling end of a second of said split struts, the middle of the collar is provided with an internal thread, the coupling end of the first of said split struts is inserted into the coupling end of the second of said split struts, and the internal thread is engaged with the external thread, and a circumferential fixing means is provided between the collar and the second of said split struts.

7. The workpiece support bar of claim 6, wherein the circumferential fixing means comprises an outer sleeve, a circumferential retainer, the outer sleeve and the ring sleeve being fixedly connected by a connecting pin; the end part of the second branch supporting rod connecting end is provided with a limiting flange, one end of the outer sleeve body, which is opposite to the limiting flange, is provided with a neck part, the neck part of the outer sleeve body is sleeved at the end part of the second branch supporting rod and axially limits the limiting flange, and the outer sleeve body is limited by a circumferential limiting part.

8. The workpiece support bar of claim 7 wherein the circumferential retaining member comprises a sliding sleeve and a retaining pin, the sliding sleeve is sleeved on a second of the sub-support bar connection ends and has an end opposite to the end of the outer sleeve, the sliding sleeve has a first engaging portion at the end, the outer sleeve has a second engaging portion at the end, the first engaging portion and the second engaging portion are engaged, and the retaining pin is mounted between the sliding sleeve and the second of the sub-support bars; and a first circumferential limiting part is arranged on the circumferential outer side of the second sub-support rod connecting end, a second circumferential limiting part is arranged on the circumferential inner side of the sliding sleeve, and the first circumferential limiting part is matched with the second circumferential limiting part.

9. The workpiece support bar of claim 8 wherein the first and second engaging portions are male and female teeth.

10. The workpiece support bar of claim 8 wherein said first circumferential limit portion is an outer locating surface provided on a circumferential outer side of a second of said split struts, said outer locating surface extending in a longitudinal direction of said split struts, and said second circumferential limit portion is an inner locating surface provided on an inner wall of said slide sleeve, said outer locating surface being in sliding engagement with said inner locating surface in a longitudinal direction of said second of said split struts.

11. The workpiece support bar of claim 8 wherein a retaining ring is further fitted over a second of said sub-bars, said retaining ring being located laterally of said sleeve and retaining said sleeve.

12. The workpiece supporting device is characterized by comprising a working table, a workpiece to be processed, at least two supporting columns and the workpiece supporting rod in any one of the preceding claims, wherein the lower part of the workpiece to be processed is arranged on the working table through the at least two supporting columns, one end of the workpiece supporting rod is connected with the side part of the workpiece to be processed, and the other end of the workpiece supporting rod is connected with the working table.

13. The workpiece support device according to claim 12, wherein the support column comprises a splicing body, a third connecting hole and a third lock hole are arranged in the splicing body, the third connecting hole is formed in an end portion of each splicing body, the third lock hole is formed in a side portion of the splicing body, and the third connecting hole and the third lock hole are communicated with each other inside the splicing body; one end of the third connecting piece is arranged in the third connecting hole, the third locking piece is arranged in the third locking hole, and the third locking piece is matched with the third connecting piece in the third connecting hole and locks the third connecting piece and the splicing body.

14. A method for supporting a workpiece, characterized in that,

mounting the lower part of a workpiece to be processed on a workbench surface through a support column;

connecting the first branch supporting rod with the working table top through a fixed seat at the end part of the first branch supporting rod, and connecting the second branch supporting rod with the side part of the workpiece to be processed through a fixed seat at the end part of the second branch supporting rod;

and butting the first branch supporting rod with the second branch supporting rod to realize the fixation of the workpiece to be processed.

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