Clamping tool for sheet part machining

Abstract

The utility model discloses a clamping tool for sheet part processing, which comprises a body, a gland and a compression bolt, a part blank is placed on the body, the gland is buckled at one end of the body, the gland and the body jointly clamp and fix the part blank, and the bolt penetrates through the gland and is screwed on the body to serve as a driving component for applying clamping force. The gland is of a cavity structure and is installed on the body through a bolt, the bolt is tightened, and the gland moves downwards to fix a workpiece. The clamping tool disclosed by the utility model is mainly used for processing thin sheet parts, and is realized by replacing a mode of directly clamping the parts by equipment with an equipment clamping tool. According to the clamping tool, the problem that sheet parts cannot be clamped is solved, meanwhile, the clamping tool can clamp multiple parts at the same time, continuous machining of the multiple parts is achieved, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing auxiliary tooling, in particular to a tooling for processing and clamping thin-sheet parts. Background Art

[0002] In the field of machining, machining slender shafts and thin parts is generally considered a headache for workers. These parts are difficult to clamp, experience large machining runout, and are prone to deformation. Few tooling solutions exist on the market that can meet the machining needs of these parts, so the only option is to manufacture fixtures tailored to the specific machining requirements.

[0003] In view of the above, it is necessary to propose a clamping tool for thin-film parts processing to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects in the prior art and provide a tool for processing and clamping thin-sheet parts.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a tool for processing and clamping thin parts, including a main body, a pressure cover, and a tightening bolt. The part blank is placed on the main body, the pressure cover is buckled on one end of the main body, and together with the main body, the part blank is clamped and fixed. The bolt passes through the pressure cover and is screwed to the main body as a driving component for applying clamping force.

[0006] Furthermore, the body has a cylindrical portion and a carrying plate, one end of the cylindrical portion is an insertion end, and the other end is provided with a carrying plate, and the carrying plate is coaxially arranged with the cylindrical portion;

[0007] The pressure cover has a cylindrical shape, one end of the pressure cover is concave to form a socket, the socket and the insertion end are plug-fitted together, and the pressure cover is provided with a through hole along the axial direction for the tightening bolt to pass through.

[0008] Furthermore, the insertion end is provided with a first screw hole corresponding to the through hole, and the end of the clamping bolt is screwed into the first screw hole.

[0009] Furthermore, a plurality of U-shaped notches are provided on the circumference of the carrier plate, and the notches are used to avoid cutting tools when machining parts.

[0010] Furthermore, a clamping rod is provided on the center of the bottom of the carrier plate.

[0011] Furthermore, it also includes a centering and tightening structure, which includes a core rod arranged inside the main body, and an axial cavity is provided inside the main body for the core rod to move in the axial direction; the cylindrical part is provided with a plurality of radial through grooves along the radial direction, and a tightening block is provided in the radial through groove for moving radially; the core rod and the tightening block are coupled, and when the core rod moves in the axial direction, it drives the plurality of circumferential tightening blocks to move radially at the same time.

[0012] Furthermore, a plurality of driving ribs are provided circumferentially on the outer wall of the core rod, the driving ribs correspond to the radial through grooves, the length direction of the driving ribs is arranged along the axial direction of the core rod, and the height direction of the driving ribs extends along the radial direction of the core rod; at least two right-angled trapezoidal driving blocks are formed on the driving ribs, and the driving blocks have driving surfaces arranged in an inclined direction, and the ends of the driving surfaces are connected to a first vertical surface arranged along the vertical direction, and the ends of the first vertical surface are connected to a first horizontal surface.

[0013] Furthermore, the inner side wall of the tensioning block is matched with the driving block to provide an inclined wedge block, which has a fitting surface with the same inclination angle as the driving surface, and a second vertical surface is provided at the upper and lower ends of the fitting surface respectively, and a space for axial movement of the driving block is formed between the two inclined wedge blocks.

[0014] Furthermore, the centering and tightening structure also includes an elastic component that simultaneously contracts each tightening block radially into the radial through groove.

[0015] Furthermore, a second screw hole is provided at one end of the core rod, and a screw is provided at the other end; light holes are provided at both ends of the body along the axis, the supporting plate end is the first light hole, and the insertion end is the second light hole, the screw passes through the first light hole and is screwed with a nut, and the second screw hole is set toward the second light hole, so that the tightening bolt passes through the second light hole and is screwed into the second screw hole.

[0016] The advantages and beneficial effects of the utility model are:

[0017] This utility model discloses a clamping fixture for machining thin parts. The gland is a cavity-shaped structure and is bolted to the main body. When the bolts are tightened, the gland moves downward to secure the workpiece. This clamping fixture is primarily used for machining thin parts. It replaces the method of directly clamping the parts with a machine-mounted fixture. This solves the problem of thin parts being unable to be clamped. Furthermore, the clamping fixture can simultaneously clamp multiple parts, enabling continuous production and improving machining efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a clamping tool for processing and clamping thin parts in the utility model;

[0019] Figure 2 This is a structural diagram of a fixture for processing and clamping thin-film parts in the utility model;

[0020] Figure 3 It is a structural diagram of the main body in the utility model;

[0021] Figure 4 This is a schematic structural diagram of the pressure cover in the utility model;

[0022] Figure 5 This is a schematic structural diagram of the extension of the tensioning block in the second embodiment of the present invention;

[0023] Figure 6 This is a schematic structural diagram of the contraction of the tensioning block in the second embodiment of the present invention;

[0024] Figure 7 This is a partial structural cross-sectional diagram of Example 2 of the present utility model;

[0025] Figure 8 This is an exploded view of Example 2 of the present utility model;

[0026] In the figure: 1. body; 2. pressure cover; 3. tightening bolt; 4. part blank; 5. cylindrical part; 6. bearing plate; 7. insertion end; 8. socket; 9. through hole; 10. first screw hole; 11. notch; 12. clamping rod; 13. centering and tightening structure; 14. core rod; 15. axial cavity; 16. radial through groove; 17. tightening block; 18. driving rib; 19. driving block; 20. driving surface; 21. first vertical surface; 22. first horizontal surface; 23. oblique wedge block; 24. fitting surface; 25. second vertical surface; 26. elastic component; 27. second screw hole; 28. screw; 29. ​​first light hole; 30. second light hole; 31. nut; 32. ring groove; 33. hoop spring; 34. outer support plate; 35. hoop groove; 36. avoidance groove. DETAILED DESCRIPTION

[0027] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0028] Example 1:

[0029] A fixture for processing and clamping thin parts, such as Figure 1-4As shown, it includes a main body 1, a pressure cover 2, and a tightening bolt 3. The main body 1 holds a part blank 4, and the part blank 4 is a circular ring-shaped thin sheet. During processing, the inner rings of several part blanks 4 are put on the main body 1 to form a stacked form of multiple part blanks 4. The pressure cover 2 is buckled on one end of the main body 1, and together with the main body 1, the part blank 4 is clamped and fixed. When several pieces of part blanks 4 are stacked and clamped, they can be easily processed together. When multiple part blanks 4 are stacked for processing, the overall rigidity of the blank can be improved to avoid the phenomenon of knife vibration during the processing. The bolt passes through the pressure cover 2 and is screwed to the main body 1 as a driving component for applying clamping force.

[0030] Specifically, such as Figure 2 、 3 As shown, the body 1 has a cylindrical portion 5 and a carrying plate 6, and the carrying plate 6 is coaxially arranged with the cylindrical portion 5; one end of the cylindrical portion 5 is an insertion end 7, and the circular hole in the middle of the part blank 4 is sleeved on the cylindrical portion 5 from the insertion end 7, so the diameter of the cylindrical portion 5 of the body 1 is adapted to the diameter of the circular hole in the center of the processed part blank 4; a carrying plate 6 is provided at the other end of the cylindrical portion 5, and the part blank 4 falls on the carrying plate 6 when installed. When multiple part blanks 4 are sleeved on the cylindrical portion 5 and squeezed toward one side of the carrying plate 6, the carrying plate 6 becomes a limit of one end of the workpiece; the pressure cover 2 has a cylindrical shape, and one end of the pressure cover 2 is concave to form a socket 8, as shown Figure 4 As shown, after the part blank 4 is assembled, the socket 8 of the pressure cover 2 is inserted from the insertion end 7 so that the socket 8 and the insertion end 7 form a plug-in fit, and the pressure cover 2 presses the multiple parts blanks 4, thereby clamping and fixing the two ends of the workpiece. In order to increase the pressure and maintain the fixing effect, the insertion end 7 is provided with a first screw hole 10 corresponding to the through hole 9, as shown in FIG. Figure 1 、 2 As shown, a through hole 9 for the clamping bolt 3 to pass through is provided in the axial direction of the pressure cover 2. The clamping bolt 3 is passed through the through hole 9 and screwed into the first screw hole 10. As the clamping bolt 3 rotates, the clamping force on the part blank 4 can be gradually increased, thereby making multiple part blanks 4 become a whole, effectively increasing the rigidity of the workpiece.

[0031] Furthermore, a plurality of U-shaped notches 11 are provided around the circumference of the carrier plate 6, and the notches 11 are used to avoid cutting tools when machining parts. Figure 1 As shown, this tool is used to groove the edge of a thin-film part. The notch 11 allows the tool to move up and down to process the part blank 4 without hitting the tool. A clamping rod 12 is provided on the bottom center of the carrier plate 6. After the tool completes the clamping of the part blank 4, it can be fixed to the chuck end of the machining center through the clamping rod 12, and is used to control the rotation angle of the tool to facilitate the overall processing.

[0032] Example 2:

[0033] In the aforementioned embodiment, when clamping multiple pieces of part blanks 4, it is necessary to maintain the concentricity of several pieces of part blanks 4, so as to maintain the uniformity and accuracy of the processing of each workpiece. In Example 1, in order to maintain the concentricity of all part blanks 4, the diameter of the cylindrical portion 5 needs to be processed to be the same as the diameter of the circular hole of the part blank 4 in order to maintain better concentricity. However, the problem that comes with it is that it is difficult to fit the part blank 4 onto the cylindrical portion 5, and it is also difficult to remove it at the same time. If it is forcibly removed, it is easy to cause the thin sheet-like part blank 4 to bend and deform; as a second best option, the diameter of the cylindrical portion 5 can only be processed to be smaller than the circular hole, but the concentricity of the part blank 4 and the tooling or the concentricity between the part blanks 4 cannot be guaranteed, resulting in a decrease in processing accuracy.

[0034] As an improvement, a centering and tightening structure 13 is also provided. Figure 5-8 As shown, the centering and tightening structure 13 includes a core rod 14 arranged inside the body 1, and an axial cavity 15 is provided inside the body 1 for the core rod 14 to move along the axial direction; Figure 8 As shown, in this embodiment, the axial cavity 15 takes a cylindrical cavity as an example, and the corresponding part of the core rod 14 is also cylindrical, and the length of the core rod 14 in the axial cavity 15 is less than the length of the axial cavity 15, so that the core rod 14 can move along the axial direction in the axial cavity 15, and the axial movement of the core rod 14 is used to drive the surrounding tensioning blocks 17 to move radially, thereby forming a centering clamp for the part blank 4 on the tooling.

[0035] Specifically, the cylindrical portion 5 is provided with a plurality of radial through grooves 16 along the radial direction, such as Figure 7 、 8 As shown, six radial through slots 16 are evenly distributed and connected around the axial cavity 15. The number of radial through slots 16 is not limited. A tensioning block 17 that moves radially is provided in the radial through slot 16. The tensioning block 17 is generally rectangular and strip-shaped and is arranged longitudinally along the axial direction. It can move radially in the radial through slot 16. Specifically, the core rod 14 is coupled with the tensioning block 17. When the core rod 14 moves axially, it drives multiple tensioning blocks 17 in the circumferential direction to move radially at the same time.

[0036] Furthermore, a plurality of driving ribs 18 are provided on the outer wall of the core rod 14 in the circumferential direction. Figure 7As shown, the driving ribs 18 correspond to the radial grooves 16, and the driving ribs 18 are correspondingly inserted into each radial groove 16, so that the core rod 14 can only move axially in the axial cavity 15 and cannot rotate; the length direction of the driving ribs 18 is arranged along the axial direction of the core rod 14, and the height direction of the driving ribs 18 extends along the radial direction of the core rod 14, so that the driving ribs 18 are inserted into the radial grooves 16; at least two right-angled trapezoidal driving blocks 19 are formed on the driving ribs 18, and the driving blocks 19 have driving surfaces 20 arranged in an inclined direction, as shown in FIG. Figure 7 As shown, the driving surface 20 is arranged to face obliquely downward, and the upper end of the driving surface 20 is connected to a first vertical surface 21 arranged along the vertical direction, and the upper end of the first vertical surface 21 is connected to a first horizontal surface 22, thereby forming a trapezoidal driving block 19.

[0037] Further, such as Figure 7 、 8 As shown, the inner sidewall of the tensioning block 17 is provided with an inclined wedge 23 in conjunction with the driving block 19. The inclined wedge 23 has a contact surface 24 with the same inclination angle as the driving surface 20. The contact surface 24 faces obliquely upward and contacts the driving surface 20. When the core rod 14 moves axially, the inclined surfaces of the driving surface 20 and the contact surface 24 slide against each other, causing the tensioning block 17 to move radially. Second vertical surfaces 25 are provided at the upper and lower ends of the contact surface 24, respectively. A space is formed between the two inclined wedges 23 for the axial movement of the driving block 19. It is understood that, depending on the length of the cylindrical portion 5 of the main body 1 of this tooling, a plurality of driving blocks 19 and inclined wedges 23 can be provided to cooperate, and the adjustment can be made as the length increases. In this embodiment, two sets are provided as an example.

[0038] The aforementioned driving block 19 and the inclined wedge block 23 can only move the tensioning block 17 outward and cannot be retracted from the southeast. Furthermore, the centering tensioning structure 13 also includes an elastic component 26 that simultaneously contracts each tensioning block 17 radially into the radial through groove 16. Specifically, as Figure 7 、 8As shown, a plurality of annular grooves 32 are provided on the cylindrical portion 5, two of which are exemplified in the figure, and at least two are provided. A hoop spring 33 is sleeved in the annular groove 32. The hoop spring 33 is similar to a spring and is sleeved on multiple tensioning blocks 17. When the tensioning blocks 17 move together in the radial direction, the hoop spring 33 can be expanded. When the driving block 19 does not apply pressure to the tensioning blocks 17, the elastic force of the hoop spring 33 causes each tensioning block 17 to retract into the radial through groove 16. In order to facilitate the installation of the hoop spring 33 in the tooling, the tensioning block 17 in this embodiment is divided into two parts, and the most part of the tensioning block 17 body 1 is sunk into the radial cavity. The outer side of the clamping plate 34 is provided with a hoop groove 35 on the main body 1 of the tensioning block 17, and the position of the hoop groove 35 corresponds to the position of the annular groove 32. Specifically, after the main body 1 of each tensioning block 17 is installed in the radial channel, the outer support plate 34 is not installed at this time, and the hoop groove 35 corresponds to the position of the annular groove 32. The hoop spring 33 is inserted into the hoop groove 35 and the annular groove 32, and then each outer support plate 34 is installed on the corresponding tensioning block 17. The outer support plate 34 can be fixed to the tensioning block 17 by a countersunk screw (not shown in the figure). Of course, the outer support plate 34 can be fixed to the tensioning block 17 to form a whole by means of snaps, gluing, etc.

[0039] Further, such as Figure 7 As shown, one end of the core rod 14 is provided with a second screw hole 27, and the other end is provided with a screw rod 28; both ends of the body 1 are provided with light holes along the axis, and the light holes are channels without threads. Specifically, the end of the supporting plate 6 is the first light hole 29, and the insertion end 7 is the second light hole 30. The screw rod 28 passes through the first light hole 29 and is screwed with a nut 31. The second screw hole 27 is set toward the second light hole 30, so that the tightening bolt 3 passes through the second light hole 30 and is screwed into the second screw hole 27. In specific use, multiple part blanks 4 are set on the cylindrical part 5, and then the nut 31 is rotated. Under the drive of the nut 31, the core rod 14 is pulled downward by the screw 28. When moving downward, the surrounding tightening blocks 17 slide outward at the same time, thereby forming a center tightening for each part blank 4. Therefore, in this embodiment, the cylindrical part 5 can be processed to be smaller than the circular hole of the part blank 4, and the centering tightening structure 13 is used to center and fix the set of each part blank 4. It can be understood that it is not necessary to apply a large torque to the nut 31 when performing centering tightening and fixing. In actual use, It is sufficient to tighten the nut 31 by hand, or to slightly tighten the nut 31 with a wrench without applying too much force, because each part blank 4 is a thin part and is not compressed when stacked, so it is relatively easy to move the position laterally; the centering and tightening structure 13 can be tightened and centered by twisting the nut 31 by hand to move each tightening block 17 outward a small distance; after centering each part blank 4, the pressure cover 2 is pressed onto the insertion end 7. After centering and tightening, the tightening block 17 will protrude from the surface of the cylindrical portion 5. For this reason, in this embodiment, an avoidance groove 36 is provided on the inner wall of the socket 8, such as Figure 6 As shown, during installation, the avoidance groove 36 is installed facing the tension block 17, and then the clamping bolt 3 is screwed into the second screw hole 27 at the end of the core rod 14 through the second light hole 30, and tightened to clamp the part blank 4;

[0040] The nut 31 provided in this embodiment forms a mutually locking effect with the clamping bolt 3. Since the nut 31 was previously only screwed by hand or fixed with a small torque, it is not conducive to subsequent processing. Because the turning and other processes in the processing process will cause vibration, it is inevitable that the nut 31 will loosen, and even cause the nut 31 to fall off, thereby losing the tightening effect. In the tightening process of the clamping bolt 3 in this embodiment, the clamping bolt 3 is threaded on the core rod 14 to form a pulling trend on the core rod 14, thereby forming a tightening effect on the nut 31 at the other end, thereby preventing the nut 31 from loosening; the nuts 31 and the clamping bolt 3 at both ends are well fixed, and when disassembly, if either end is disassembled, the other end can be loosened. For example, when disassembling, the nut 31 is removed first, and the clamping bolt 3 will also loosen, thereby facilitating disassembly; the use effect is better.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A fixture for processing and clamping thin parts, characterized in that: It comprises a main body (1), a pressure cover (2), and a clamping bolt (3); a part blank (4) is placed on the main body (1); the pressure cover (2) is fastened to one end of the main body (1) and together with the main body (1) clamps and fixes the part blank (4); the bolt passes through the pressure cover (2) and is screwed to the main body (1) as a driving component for applying a clamping force; The body (1) comprises a cylindrical portion (5) and a supporting plate (6); one end of the cylindrical portion (5) is an insertion end (7); the other end is provided with the supporting plate (6); and the supporting plate (6) is coaxially arranged with the cylindrical portion (5).

2. A fixture for processing and clamping thin-film parts according to claim 1, characterized in that: The pressure cover (2) has a cylindrical shape, one end of the pressure cover (2) is concave to form a socket (8), the socket (8) is plug-fitted with the insertion end (7), and the pressure cover (2) is provided with a through hole (9) along the axial direction for the clamping bolt (3) to pass through.

3. The fixture for processing and clamping thin-film parts according to claim 2, characterized in that: The insertion end (7) is provided with a first screw hole (10) corresponding to the through hole (9), and the end of the clamping bolt (3) is screwed into the first screw hole (10).

4. The fixture for processing and clamping thin-film parts according to claim 2, characterized in that: A plurality of U-shaped notches (11) are provided in the circumference of the carrier plate (6), and the notches (11) are used to avoid cutting tools when machining parts.

5. The fixture for processing and clamping thin-film parts according to claim 2, characterized in that: A clamping rod (12) is provided on the center portion of the bottom of the carrier plate (6).

6. The fixture for processing and clamping thin-film parts according to claim 2, characterized in that: The invention also includes a centering and tightening structure (13), wherein the centering and tightening structure (13) includes a core rod (14) arranged inside the body (1), and an axial cavity (15) is provided inside the body (1) for the core rod (14) to move in the axial direction; the cylindrical portion (5) is provided with a plurality of radial through grooves (16) along the radial direction, and a tightening block (17) is provided in the radial through groove (16) for moving in the radial direction; the core rod (14) and the tightening block (17) are coupled to each other, and when the core rod (14) moves in the axial direction, the plurality of circumferential tightening blocks (17) are driven to move in the radial direction at the same time.

7. The fixture for processing and clamping thin-film parts according to claim 6, characterized in that: A plurality of driving ribs (18) are provided on the outer wall of the core rod (14) in a circumferential direction. The driving ribs (18) correspond to the radial through grooves (16). The length direction of the driving ribs (18) is arranged along the axial direction of the core rod (14), and the height direction of the driving ribs (18) extends along the radial direction of the core rod (14). At least two right-angled trapezoidal driving blocks (19) are formed on the driving ribs (18). The driving blocks (19) have driving surfaces (20) arranged in an inclined direction. The ends of the driving surfaces (20) are connected to a first vertical surface (21) arranged in a vertical direction. The ends of the first vertical surface (21) are connected to a first horizontal surface (22).

8. The fixture for processing and clamping thin-film parts according to claim 6, characterized in that: The inner side wall of the tensioning block (17) is matched with the driving block (19) to be provided with an inclined wedge block (23). The inclined wedge block (23) has a fitting surface (24) with the same inclination angle as the driving surface (20). Second vertical surfaces (25) are respectively provided at the upper and lower ends of the fitting surface (24). A space for axial movement of the driving block (19) is formed between the two inclined wedge blocks (23).

9. The fixture for processing and clamping thin-film parts according to claim 6, characterized in that: The centering tensioning structure (13) further includes an elastic component (26) for simultaneously contracting each tensioning block (17) radially into the radial through groove (16).

10. The fixture for processing and clamping thin-film parts according to claim 6, characterized in that: A second screw hole (27) is provided at one end of the core rod (14), and a screw rod (28) is provided at the other end; light holes are provided at both ends of the body (1) along the axis, the end of the carrier plate (6) is the first light hole (29), and the insertion end (7) is the second light hole (30); the screw rod (28) passes through the first light hole (29) and is screwed with a nut (31); the second screw hole (27) is arranged toward the second light hole (30), so that the clamping bolt (3) passes through the second light hole (30) and is screwed into the second screw hole (27).

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