Workpiece supporting device and workpiece supporting method

Abstract

The present invention discloses a workpiece support device and a workpiece support method, wherein the workpiece support device comprises a worktable, a workpiece to be processed, at least two support columns and a workpiece support rod, wherein the lower part of the workpiece to be processed is mounted on the worktable through at least two support columns, and one end of the workpiece support rod is connected to the side of the workpiece to be processed, and the other end is connected to the worktable. The present invention can realize reliable and flexible installation of the workpiece, and meet the requirements of workpiece processing.

Description

Technical Field

[0001] The present invention belongs to the field of workpiece clamping, and in particular relates to a workpiece supporting device and a workpiece supporting method. Background Art

[0002] During machining, fixtures are basically used. Common fixtures include vises and chucks, which are used to clamp and position the workpiece to be processed.

[0003] However, existing clamping methods are limited and cannot fully clamp complex workpieces. They cannot adapt to the complex process requirements of workpiece processing and are inconvenient for complex position adjustment and positioning of the workpiece. With the development of intelligent processing equipment, existing workpiece clamping methods are even more unable to meet the requirements of workpiece clamping. Summary of the Invention

[0004] The object of the present invention is to provide a workpiece supporting device and a workpiece supporting method, which can realize reliable and flexible installation of the workpiece and meet the requirements of workpiece processing.

[0005] The present invention provides a workpiece support device, comprising a work table, a workpiece to be processed, at least two support columns and a workpiece support rod. The lower part of the workpiece to be processed is installed on the work table through at least two of the support columns, and one end of the workpiece support rod is connected to the side of the workpiece to be processed, and the other end is connected to the work table.

[0006] In one embodiment, the workpiece support rod includes a main support rod and two fixed seats, the main support rod includes at least two branch support rods, at least two of the branch support rods are connected, the first end of the main support rod is movably connected to the first fixed seat through a rotating shaft, and the second end of the main support rod is also movably connected to the second fixed seat through a rotating shaft.

[0007] In one embodiment, the branch support rod includes a branch rod body and a connecting seat, the outer end of the branch rod body has an end head, and the connecting seat is provided with a first connecting hole and a first locking hole, the first connecting hole is provided at the end of the connecting seat, the first locking hole is provided on the 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 installed in the first connecting hole, and the first locking piece is installed in the first locking hole and cooperates with the end head in the first connecting hole, and locks the end head and the connecting seat.

[0008] In one embodiment, a second connecting member is further included, and a second connecting hole and a second locking hole are provided on the fixing base, the second connecting hole is provided at the end of the fixing base, the second locking hole is provided at the side 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 member is installed in the second connecting hole, and the second locking member is installed in the second locking hole and cooperates with the second connecting member in the second connecting hole to lock the second connecting member to the fixing base.

[0009] In one embodiment, a ring sleeve is further included. An external thread is provided at the connecting end of the first branch rod, and the connecting end of the second branch rod is hollow. The ring sleeve is provided at the connecting end of the second branch rod, and an internal thread is provided in the middle of the ring sleeve. The connecting end of the first branch rod is inserted into the connecting end of the second branch rod, and the internal thread cooperates with the external thread. A circumferential fixing device is provided between the ring sleeve and the second branch rod.

[0010] In one embodiment, the circumferential fixing device includes an outer sleeve and a circumferential limiting member, and the outer sleeve is fixedly connected to the ring sleeve by a connecting nail; a limiting flange is provided at the end of the second branch rod connecting end, and a neck is provided on the end of the outer sleeve opposite to the limiting flange, and the neck of the outer sleeve is sleeved on the end of the second branch rod, and the limiting flange is axially limited, and the outer sleeve is limited by the circumferential limiting member.

[0011] In one embodiment, the circumferential limit member includes a sliding sleeve and a fixing pin. The sliding sleeve is sleeved on the second branch rod connection end, and its end is opposite to the end of the outer shell. A first engaging portion is provided at the end of the sliding sleeve, and a second engaging portion is provided at the end of the outer shell. The first engaging portion cooperates with the second engaging portion, and the fixing pin is installed between the sliding sleeve and the second branch rod; a first circumferential limiting portion is provided on the circumferential outer side of the second branch rod connection end, and a second circumferential limiting portion is provided on the circumferential inner side of the sliding sleeve, and the first circumferential limiting portion cooperates with the second circumferential limiting portion.

[0012] In one embodiment, the first circumferential limiting portion is an outer positioning surface provided on the circumferential outer side of the second branch support rod, and the outer positioning surface extends along the longitudinal direction of the branch support rod. The second circumferential limiting portion is an inner positioning surface provided on the inner wall of the sliding sleeve, and the outer positioning surface and the inner positioning surface are slidably matched along the longitudinal direction of the second branch support rod.

[0013] In one embodiment, the support column includes a splicing body, and a third connecting hole and a third locking hole are provided in the splicing body. The third connecting hole is opened at the end of each splicing body, and the third locking hole is opened on the side of the splicing body. The third connecting hole and the third locking hole are communicated with each other inside the splicing body; one end of the third connecting member is installed in the third connecting hole, and the third locking member is installed in the third locking hole. The third locking member cooperates with the third connecting member in the third connecting hole and locks the third connecting member to the splicing body.

[0014] The present invention also provides a workpiece supporting method,

[0015] Install the lower part of the workpiece to be processed on the work surface through the support column;

[0016] One end of the workpiece support rod is connected to the work table, and the other end of the workpiece support rod is connected to the side of the workpiece to be processed to achieve clamping and fixing of the workpiece to be processed.

[0017] The technical solution provided by the present invention has the following advantages and effects:

[0018] When clamping and fixing the workpiece to be processed, the lower part of the workpiece to be processed is installed on the work table through the support column. The support column plays a basic supporting role for the workpiece to be processed. In order to prevent the workpiece to be processed from turning over or overturning, the side of the workpiece to be processed is supported by the workpiece support rod. Through this structure, the workpiece to be processed can be clamped and fixed. The clamping method is very flexible and the structure is simple, which can adapt to the complex processing position requirements of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein illustrate specific examples of the technical solutions described in the present invention, and together with the specific implementation methods constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0020] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0021] Figure 1 is a three-dimensional diagram of the workpiece support device in an embodiment of the present invention;

[0022] Figure 2 is a top view of the workpiece support device in an embodiment of the present invention;

[0023] Figure 3 is a side view of the workpiece support device in an embodiment of the present invention;

[0024] Figure 4is a side sectional view of the workpiece support device in an embodiment of the present invention;

[0025] Figure 5 is a side exploded view of the workpiece support device in an embodiment of the present invention;

[0026] Figure 6 is a cross-sectional view of the connection of the workpiece support rod in an embodiment of the present invention;

[0027] Figure 7 is a cross-sectional view of the connection between two branch struts in an embodiment of the present invention;

[0028] Figure 8 is a cross-sectional view of the connection of the end portion of the workpiece support rod in an embodiment of the present invention;

[0029] Figure 9 is a structural diagram of a second branch support rod in an embodiment of the present invention;

[0030] Figure 10 is a structural diagram of the second connecting member and the third connecting member in an embodiment of the present invention;

[0031] Figure 11 1 is a structural diagram of a limit ring in an embodiment of the present invention;

[0032] Figure 12 is a structural diagram of the first side of the outer shell in an embodiment of the present invention;

[0033] Figure 13 is a structural diagram of the second side of the outer shell in an embodiment of the present invention;

[0034] Figure 14 is a structural diagram of the first side of the sliding sleeve in an embodiment of the present invention;

[0035] Figure 15 is a structural diagram of the second side of the sliding sleeve in an embodiment of the present invention;

[0036] Figure 16 is an exploded view of the connection of the end portions of the support rods in an embodiment of the present invention;

[0037] Figure 17 1 is a structural diagram of the first locking component, the second locking component, and the third locking component in an embodiment of the present invention;

[0038] Figure 18 This is a structural diagram of a connecting base in an embodiment of the present invention;

[0039] Figure 19 This is a structural diagram of a fixing base in an embodiment of the present invention;

[0040] Figure 20 is a structural diagram of a support column in an embodiment of the present invention;

[0041] Description of reference numerals:

[0042] 11. Workpiece to be processed, 12. Work surface, 13. Press block, 131. Nail hole, 14. Lock nail, 15. Convex lock tooth, 16. Concave lock tooth, 17. Positioning block, 18. Threaded end,

[0043] 20. Support column, 21. Splicing body, 211. Third connecting hole, 212. Third locking hole, 22. Third connecting member, 23. Third locking member,

[0044] 30. Workpiece support rod, 301. Main support rod, 31. Branch support rod, 311. Branch rod body, 3111. End, 312. Connecting seat, 3121. First connecting hole, 3122. First locking hole, 3123. First locking member, 313. Connecting ear, 314. Axis hole,

[0045] 32. Fixing seat, 321. Rotating shaft, 322. Second connecting member, 323. Second connecting hole, 324. Second locking hole, 325. Second locking member, 33. Fixing screw,

[0046] 41. Ring sleeve, 411. Internal thread, 412. Connecting pin, 42. External thread, 43. Outer sleeve, 44. Sliding sleeve, 441. Fixing pin, 45. Limiting ring, 451. Limiting pin, 461. Limiting flange, 462. Neck, 471. First meshing portion, 472. Second meshing portion, 481. External locating surface, 482. Internal locating surface. DETAILED DESCRIPTION

[0047] To facilitate understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0048] Unless otherwise specified or defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art. In the context of the actual scenarios of the technical solutions of the present invention, all technical and scientific terms used herein may also have the meanings corresponding to the purpose of implementing the technical solutions of the present invention.

[0049] Unless otherwise specified or defined, the "first, second..." used in this article is only used to distinguish names and does not represent a specific quantity or order.

[0050] Unless stated otherwise or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0051] It should be noted that when an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there can be an intermediate element; when an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element; when an element is considered to be "mounted on" another element, it can be directly mounted on the other element or there can be an intermediate element. When an element is considered to be "located on" another element, it can be directly located on the other element or there can be an intermediate element.

[0052] Unless otherwise specified or defined, the “said” and “the” used in this document refer to the technical features or technical contents mentioned or described before the corresponding position, and the technical features or technical contents may be the same as or similar to the technical features or technical contents mentioned therein.

[0053] There is no doubt that technical contents or technical features that are contrary to the purpose of the present invention or are obviously contradictory should be excluded.

[0054] like Figures 1 to 20 As shown, the workpiece supporting device includes a work table 12, a workpiece to be processed 11, two support columns 20 and a workpiece supporting rod 30. The lower part of the workpiece to be processed 11 is installed on the work table 12 through the two support columns 20. One end of the workpiece supporting rod 30 is connected to the side of the workpiece to be processed 11, and the other end is connected to the work table 12.

[0055] Support column 20

[0056] The structure of the support column 20 should be combined with Figure 5 、 Figure 20 As shown, it includes a splicing body 21, in which a third connecting hole 211 and a third locking hole 212 are provided. The third connecting hole 211 is opened at the end of each splicing body 21, and the third locking hole 212 is opened at the side of the splicing body 21. The third connecting hole 211 and the third locking hole 212 are communicated with each other inside the splicing body 21; one end of the third connecting member 22 is installed in the third connecting hole 211, and the third locking member 23 is installed in the third locking hole 212. The third locking member 23 cooperates with the third connecting member 22 in the third connecting hole 211 and locks the third connecting member 22 to the splicing body 21.

[0057] In this embodiment, when one splicing body 21 is used for connection, the splicing body 21 can be connected to the workpiece to be processed 11 and the work table 12 through a third connecting member 22; the number of splicing bodies 21 in the support column 20 can be selected and set according to the clamping height of the workpiece. When multiple splicing bodies 21 are used, the connection between two adjacent splicing bodies 21 is connected using the above-mentioned connection method.

[0058] Workpiece support rod 30

[0059] The structure of the workpiece support rod 30 is as follows: Figures 6 to 19 As shown, it includes a main support rod 301 and two fixed seats 32, the main support rod 301 includes two sections of branch support rods 31, the branch support rod 31 includes a branch rod body 311 and a connecting seat 312, the two outer ends of the branch rod body 311 each have an end 3111, the end 3111 of the branch rod body 311 is connected to the connecting seat 312, two connecting ears 313 are provided on the connecting seat 312, a connecting ear 313 is provided on the fixed seat 32, and an axial hole 314 is provided on the connecting ears. After the rotating shaft 321 passes through the axial hole 314, the two ends of the main support rod 301 are movably connected to the two fixed seats 32, the lower fixed seat 32 is connected to the work table 12; the upper fixed seat 32 is connected to the workpiece 11 to be processed.

[0060] Connection between the rod body and the end 3111

[0061] The connection structure between the end 3111 and the connection base 312 is as follows:

[0062] The connecting seat 312 is provided with a first connecting hole 3121 and two first locking holes 3122, and the two first locking holes 3122 are respectively provided on two opposite sides of the connecting seat 312, the first connecting hole 3121 is opened at the end of the connecting seat 312, and the first locking hole 3122 is opened at the side of the connecting seat 312, and the first connecting hole 3121 and the first locking hole 3122 are communicated with the inside of the connecting seat 312; one end of the end head 3111 is installed in the first connecting hole 3121, and the two first locking members 3123 are respectively installed in the first locking holes 3122 from both sides, a convex locking tooth 15 is provided on the end head 3111, and a concave locking tooth 16 is provided on the first locking member 3123, the convex locking tooth 15 of the end head 3111 cooperates with the concave locking teeth 16 of the first locking members 3123 on both sides to lock the end head 3111.

[0063] The connection between the fixing seat 32 and the work surface 12 or the workpiece 11 to be processed

[0064] The fixing base 32 is provided with a second connecting hole 323 and two second locking holes 324, and the second locking holes 324 are respectively provided on two opposite sides of the fixing base 32, the second connecting hole 323 is provided at the end of the fixing base 32, and the second locking hole 324 is provided at the side of the fixing base 32, and the second connecting hole 323 and the second locking holes 324 are communicated with the inside of the fixing base 32; one end of the second connecting member 322 is installed in the second connecting hole 323, and the second locking member 325 is installed in the second locking hole 324 and cooperates with the second connecting member 322 in the second connecting hole 323, and the second locking members 325 in the second locking holes 324 on both sides are respectively locked from both sides of the second connecting member 322.

[0065] The second connecting member 322 can be fixedly connected to the work surface 12 or to the workpiece 11 to be processed. Through the above structure, the fixing base 32 of the workpiece support rod 30 can be quickly connected to the work surface 12 or to the workpiece 11 to be processed. To ensure the reliability of the fixed connection between the fixing base 32 and the work surface 12, the number of second connecting members 322 can be increased, and fixing screws 33 can also be used to increase the reliability of the fixed connection.

[0066] The connection between the two branch struts 31

[0067] There are two purposes for arranging the main support rod 301 in sections:

[0068] First, it is used to adjust the length of the main support rod 301 to meet the actual position or angle requirements of the workpiece 11 to be processed. Second, when installing the workpiece 11 to be processed, due to the segmented structure, different connection and installation sequences can be determined as needed, making the installation and fixing method more flexible. The following describes the connection between the two branch support rods 31:

[0069] The two branch rods 31 are connected by structures such as a ring sleeve 41, an outer sleeve 43, a sliding sleeve 44 and a limiting ring 45. An external thread 42 is provided at the connecting end of the first branch rod 31, and the connecting end of the second branch rod 31 is hollow. The ring sleeve 41 is provided at the connecting end of the second branch rod 31, and an internal thread 411 is provided in the middle of the ring sleeve 41. The connecting end of the first branch rod 31 is inserted into the connecting end of the second branch rod 31, and the internal thread 411 cooperates with the external thread 42; the outer sleeve 43 and the ring sleeve 41 are fixedly connected by a connecting nail 412; a limiting flange 461 is provided at the end of the connecting end of the second branch rod 31, and a neck 462 is provided on 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 branch rod 31 and limits the limiting flange 461 axially The outer sleeve 43 is circumferentially limited by the sliding sleeve 44 and the fixing pin 441, and the sliding sleeve 44 is sleeved on the connecting end of the second branch support rod 31, and its end is opposite to the end of the outer sleeve 43, and a first meshing portion 471 is provided at the end of the sliding sleeve 44, and a second meshing portion 472 is provided at the end of the outer sleeve 43 (in this embodiment, the first meshing portion 471 and the second meshing portion 472 are both concave and convex teeth). The first meshing portion 471 cooperates with the second meshing portion 472, and the fixing pin 441 is installed between the sliding sleeve 44 and the second branch support rod 31; an outer positioning surface 481 is provided on the circumferential outer side of the connecting end of the second branch support rod 31, and an inner positioning surface 482 is provided on the circumferential inner side of the sliding sleeve 44, and the outer positioning surface 481 and the inner positioning surface 482 slide together along the longitudinal direction of the second branch support rod 31. A limiting ring 45 is also sleeved on the second branch support rod 31 . The limiting ring 45 is located on the side of the sliding sleeve 44 and limits the sliding sleeve 44 .

[0070] The advantages and principles of this structure are described below:

[0071] An inner positioning surface 482 is provided on the inner side of the sliding sleeve 44 , and an outer positioning surface 481 is provided on the outer side of the second branch support rod 31 . The sliding sleeve 44 can only slide axially and cannot produce circumferential rotation. The outer sleeve 43 can be reliably limited circumferentially through the sliding sleeve 44 . When connecting the two branch struts 31, the external thread 42 at the end of the first branch strut 31 is inserted into the hollow part of the second branch strut 31, the fixing lock is released, and the sliding sleeve 44 retreats. Since the first meshing portion 471 is disengaged from the second meshing portion 472, the outer sleeve 43 and the ring sleeve 41 rotate, and the internal thread 411 on the inner wall of the ring sleeve 41 cooperates with the external thread 42 at the end of the first branch strut 31 to adjust the length of the entire support rod. When the length of the support rod is adjusted to the right position, the sliding sleeve 44 is pushed to be aligned with the outer sleeve 43, and the first meshing portion 471 on the sliding sleeve 44 is meshed with the second meshing portion 472. The outer sleeve 43 and the ring sleeve 41 cannot rotate circumferentially, so that the length of the entire support rod is fixed.

[0072] When adjusting the length, the neck 462 of the outer sleeve 43 and the limiting flange 461 at the end of the second branch rod 31 are locked together, which can lock the position of the outer sleeve 43 (and the first branch rod 31 threadedly connected to the ring sleeve 41). To achieve the installation of the neck 462 and the limiting flange 461, the outer sleeve 43 and the ring sleeve 41 are made into a split structure. After installation, they are fixed by connecting nails 412. The sliding sleeve 44 is positioned by the inner positioning surface 482 and the outer positioning surface 481, and will not produce circumferential rotation. It can only slide axially and cannot rotate. The concave and convex teeth at its end can achieve arbitrary adjustment of the circumferential angle, which can ensure the reliability of circumferential limitation and achieve flexible angle adjustment. A limiting ring 45 is provided on the outside of the sliding sleeve 44. After the limiting ring 45 is fixed to the second branch rod 31 by limiting nails 451, the limiting ring 45 can prevent the sliding sleeve 44 from slipping out.

[0073] The second connecting member 322 is provided with a convex locking tooth 15, and the second locking member 325 is provided with a concave locking tooth 16. The convex locking tooth 15 of the second connecting member 322 cooperates with the concave locking tooth 16 of the second locking member 325 to lock the second connecting member 322. The structure and locking mechanism of the third connecting member 22 are the same as those of the second connecting member 322 and will not be repeated here.

[0074] In this embodiment, the first locking member 3123, the second locking member 325 and the third locking member 23 all include a pressure block 13 and a locking pin 14. The concave locking teeth 16 are provided on the pressure block 13. A pin hole 131 is also provided on the pressure block 13. The locking pin 14 passes through the pin hole 131 and locks the pressure blocks 13 on both sides.

[0075] In this embodiment, when clamping and fixing the workpiece 11 to be processed, the following steps can be taken:

[0076] 1. Connect the first third connecting member 22 to the work surface 12, and connect the second third connecting member 22 to the lower part of the workpiece 11 to be processed.

[0077] 2. Place the splicing body 21 between the upper and lower third connecting members 22 and lock them together using the third locking member 23. Then, fix the workpiece 11 to be processed on the work surface 12. The number of splicing bodies 21 can be set according to the processing needs.

[0078] 3. Connect the first second connecting member 322 to the work surface 12, and connect the second second connecting member 322 to the side surface of the workpiece 11 to be processed;

[0079] 4. Place the two fixing seats 32 on the sides of the work surface 12 and the workpiece 11 to be processed, respectively. The two fixing seats 32 are locked by the second locking members 325 to achieve fixed connection between the fixing seats 32 and the work surface 12 and the sides of the workpiece 11 to be processed, respectively.

[0080] 5. Preliminary docking of the two branch struts of the main strut 301;

[0081] 6. Insert the lower end of the main support rod 301 into the first connection hole of the connection seat 312 on the work surface 12 and lock it with the first locking member; insert the upper end of the main support rod 301 into the first connection hole 3121 of the connection seat 312 on the side of the workpiece 11 to be processed and lock it with the first locking member 3123;

[0082] 7. Through the above connection, basic support for the workpiece 11 to be processed is achieved; the outer sleeve 43 (and the ring sleeve 41) are rotated to adjust the length of the main support rod 301, thereby adjusting the state of the workpiece 11 to be processed;

[0083] 8. After the length of the main support rod 301 is adjusted to the desired position, push the sliding sleeve 44 to engage with the outer sleeve 43 to lock the outer sleeve 43.

[0084] Since the present embodiment adopts a locking structure in multiple structures such as the support column, two connecting seats, and two fixing seats, and the main support rod adopts a segmented structure, the order of clamping is not limited to the aforementioned method.

[0085] In this embodiment, the support column 20 and the workpiece support rod 30 can be made of metal. Under the condition of meeting the precision, the main support rod 301 of the workpiece support rod 30 can be made of plastic or other materials. In order to meet the matching precision of the positioning block 17, the positioning block 17 can be made of wear-resistant high-precision material.

[0086] The purpose of the above embodiments is to exemplify and deduce the technical solution of the present invention, and to fully describe the technical solution, purpose and effect of the present invention. Its purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosed content of the present invention, and it does not limit the scope of protection of the present invention.

[0087] The above embodiments are not exhaustive and may include many other embodiments not listed above. Any replacements and improvements made without violating the concept of the present invention are within the scope of protection of the present invention.

Claims

1. A workpiece support device, characterized in that: It comprises a work table, a workpiece to be processed, at least two support columns and a workpiece support rod, wherein the lower part of the workpiece to be processed is mounted on the work table through at least two of the support columns, one end of the workpiece support rod is connected to the side of the workpiece to be processed, and the other end is connected to the work table; The workpiece support rod comprises a main support rod and two fixed seats, the main support rod comprises at least two sub-support rods, at least two of the sub-support rods are connected, the first end of the main support rod is movably connected to the first fixed seat through a rotating shaft, and the second end of the main support rod is also movably connected to the second fixed seat through a rotating shaft; The branch support rod comprises a branch rod body and a connecting seat, the outer end of the branch rod body has an end head, the connecting seat is provided with a first connecting hole and a first locking hole, the first connecting hole is provided at the end of the connecting seat, 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 installed in the first connecting hole, a first locking member is installed in the first locking hole and cooperates with the end head in the first connecting hole, and locks the end head with the connecting seat; The workpiece support rod also includes a ring sleeve, an external thread is provided at the connecting end of the first branch rod, and the connecting end of the second branch rod is hollow, the ring sleeve is arranged at the connecting end of the second branch rod, and an internal thread is provided in the middle of the ring sleeve, the connecting end of the first branch rod is inserted into the connecting end of the second branch rod, and the internal thread matches the external thread, and a circumferential fixing device is provided between the ring sleeve and the second branch rod; The circumferential fixing device includes an outer sleeve and a circumferential limiting member, and the outer sleeve is fixedly connected to the ring sleeve by connecting nails; a limiting flange is provided at the end of the second connecting end of the support rod, and a neck is provided on the end of the outer sleeve opposite to the limiting flange, the neck of the outer sleeve is sleeved on the end of the second support rod, and the limiting flange is axially limited, and the outer sleeve is limited by the circumferential limiting member.

2. The workpiece support device according to claim 1, characterized in that: A second connecting member is also included, and a second connecting hole and a second locking hole are provided on the fixing seat, the second connecting hole is provided at the end of the fixing seat, the second locking hole is provided at the side of the fixing seat, and the second connecting hole and the second locking hole are communicated with each other inside the fixing seat; one end of the second connecting member is installed in the second connecting hole, and a second locking member is installed in the second locking hole and cooperates with the second connecting member in the second connecting hole to lock the second connecting member and the fixing seat.

3. The workpiece support device according to claim 1, characterized in that: The circumferential limiting member includes a sliding sleeve and a fixing pin. The sliding sleeve is sleeved on the connecting end of the second branch rod, and its end is opposite to the end of the outer sleeve. A first meshing portion is provided at the end of the sliding sleeve, and a second meshing portion is provided at the end of the outer sleeve. The first meshing portion cooperates with the second meshing portion, and the fixing pin is installed between the sliding sleeve and the second branch rod; a first circumferential limiting portion is provided on the circumferential outer side of the connecting end of the second branch rod, and a second circumferential limiting portion is provided on the circumferential inner side of the sliding sleeve, and the first circumferential limiting portion cooperates with the second circumferential limiting portion.

4. The workpiece support device according to claim 3, characterized in that: The first circumferential limiting portion is an outer positioning surface arranged on the circumferential outer side of the second branch support rod, and the outer positioning surface extends along the longitudinal direction of the branch support rod. The second circumferential limiting portion 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 slidably matched along the longitudinal direction of the second branch support rod.

5. The workpiece support device according to any one of claims 1 to 4, characterized in that: The support column includes a splicing body, and a third connecting hole and a third locking hole are provided in the splicing body. The third connecting hole is opened at the end of each splicing body, and the third locking hole is opened at the side of the splicing body. The third connecting hole and the third locking hole are communicated with each other inside the splicing body; one end of the third connecting piece of the support column is installed in the third connecting hole, and the third locking piece is installed in the third locking hole. The third locking piece cooperates with the third connecting piece in the third connecting hole to lock the third connecting piece and the splicing body.

6. A workpiece supporting method based on the workpiece supporting device according to any one of claims 1 to 5, characterized in that: Install the lower part of the workpiece to be processed on the work surface through the support column; One end of the workpiece support rod is connected to the work table, and the other end of the workpiece support rod is connected to the side of the workpiece to be processed, so as to achieve clamping and fixing of the workpiece to be processed.

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