A multifunctional fixture for micro-milling of micro-small parts

Abstract

The present invention relates to a multifunctional tooling fixture for micro-milling of micro-small parts. The invention aims to solve the problems of difficulty, low efficiency and difficulty in ensuring clamping quality during micro-milling of micro-small parts. The technical solution adopted by the present invention includes a fixed clamp body and a movable clamp body arranged on a base, the fixed clamp body is provided with left and right tips, a V-shaped block is provided at the left end of the fixed clamp body, a precision jaw plate is provided at the left end of the movable clamp body, a replaceable clamping module is provided between the V-shaped block and the precision jaw plate, and a protruding screw is connected to the right side of the movable clamp body. By turning the handle, the screw can be moved forward or backward, driving the movable clamp body to move forward or backward along the fixed clamp body through a metal guide rail. Through this structure, the clamping of thin plate and block-type micro-small parts can be achieved without using multiple sets of clamps, thereby reducing costs.

Description

Technical Field

[0001] The invention relates to the technical field of special fixtures for micro-machining, and in particular to a multifunctional tooling fixture for micro-milling of micro-small parts. Background Art

[0002] As mechanical products develop towards precision and miniaturization, the application of micro parts is becoming more and more extensive, and the demand is increasing day by day. Such parts have played an irreplaceable role in modern medicine, precision instruments, biotechnology and other fields.

[0003] Micro-milling technology is an effective means to achieve precision machining of micro-parts, and plays a vital role in the machining and manufacturing of micro-parts. In the micro-milling process, the clamping quality of micro-parts has an important influence on the machining accuracy. Due to the tiny structural features, micro-parts often have difficulties in clamping during the milling process, making the clamping process of such parts time-consuming and laborious. Sometimes the clamping time even reaches half or more of the entire machining time, greatly reducing the machining efficiency. In addition, for micro-parts with complex structures, multiple sets of fixtures may be required for clamping during their machining process, thereby introducing clamping errors and further affecting the machining accuracy of the parts.

[0004] Therefore, in the micro-milling process, it is particularly important to design special tooling and fixtures for micro-parts, which has important practical significance. Summary of the invention

[0005] In order to solve the problems of difficulty, low efficiency and difficulty in ensuring clamping quality during micro-milling of micro-parts, the present invention provides a multifunctional tooling fixture for micro-milling of micro-parts, which can be suitable for the efficient clamping of micro-parts such as shafts, plates, blocks, and complex curved surfaces.

[0006] To solve the above problems, the technical solution of the present invention is: a multifunctional tooling fixture for fine milling of micro-small parts, comprising a base, a fixed clamp body and a movable clamp body are arranged on the base, a metal guide rail is arranged between the fixed clamp body and the movable clamp body to enable the movable clamp body to slide back and forth along the fixed clamp body, the right side top of the clamping device on the fixed clamp body is welded to the top seat, and the top seat is connected to the fixed clamp body through a hexagonal cylindrical head screw, characterized in that: the right side of the movable clamp body is connected with an extended screw rod, a coupling is sleeved on the extended end of the screw rod, and a driving nut is arranged at the end of the extended end; a square nut is arranged in the bottom groove of the fixed clamp body, a trapezoidal thread is arranged on the outer surface of the screw rod, the screw rod is connected to the square nut through the trapezoidal thread, and the square nut is fixedly connected to the fixed clamp body; a handle is connected to the driving nut to realize that the screw rod drives the movable clamp body forward or backward;

[0007] A V-shaped block is arranged at the left end of the fixed clamp body, a precision jaw plate is arranged at the left end of the movable clamp body, a replaceable clamping module is arranged between the V-shaped block and the precision jaw plate, and the clamping module includes a module substrate, a cylindrical stepped pin, a pad and a rectangular pressure block; an array of threaded holes is arranged on one side of the upper surface of the template substrate, and a rotating pressure plate is arranged on the other side; a stud is arranged in the threaded hole, and the other end of the stud is connected to the rotating pressure plate or the rectangular pressure block, and is tightened by a matching standard nut; a pad with a hole is also arranged on the threaded hole of the module substrate, which is used to pad the workpiece or the rectangular pressure block to a suitable height, and the cylindrical stepped pin is used in conjunction with the hole on the module substrate to position and limit the pad.

[0008] Furthermore, a dovetail groove structure is provided at the left end of the fixed clamp body, a dovetail structure is provided on the V-shaped block, and the V-shaped block is connected to the fixed clamp body through the cooperation of the dovetail and the dovetail groove.

[0009] Furthermore, a positioning block is provided on the fixed clamp body on the side of the V-shaped block, and the positioning block is fixed to the fixed clamp body by a slotted cylindrical head screw.

[0010] Furthermore, a pad is provided between the base and the fixed clamp body, the pad is connected to the fixed clamp body via four slotted cylindrical head screws, and is connected to the base via studs and four slotted countersunk screws.

[0011] Furthermore, the block nut is connected to the movable pliers body by tightening the handle.

[0012] Furthermore, the clamping module is connected to the fixed clamp body through four conical pins.

[0013] Furthermore, a long slot is provided on the positioning block.

[0014] Furthermore, a screw cover is provided on the screw to prevent dust, and the screw cover is fixed to the fixed clamp body by a slotted cylindrical head screw.

[0015] Furthermore, a spring and a locking nut are arranged on the left top of the clamping device on the fixed clamp body to prevent the parts from loosening during the tightening process.

[0016] Furthermore, the dovetail groove has a large upper opening and a small lower opening with a taper.

[0017] The beneficial effects that can be achieved by the present invention are:

[0018] 1) The present invention has a simple structure and is easy to install. It is suitable for batch micro-milling of various types of micro-parts. It uses a replaceable clamping module, and does not require multiple sets of clamps during the processing, which reduces costs and realizes the clamping of thin plate and block micro-parts. Specifically, the rectangular pressure block, studs and corresponding nuts are used in combination to clamp relatively thick block workpieces; the rotating pressure plate, studs and corresponding standard nuts are used in combination to clamp thinner plate workpieces. There is no need to design plate and block clamps separately.

[0019] 2) The present invention is aimed at the same type of micro-small parts. When the processing requirements or size characteristics are different, the fixture designed by the present invention can provide a variety of clamping solutions. Taking shaft parts as an example, when the micro-small shaft parts are suitable for processing in the vertical direction, the parts are placed in the notch of the V-shaped block, and the handle is rotated to form a clamping force between the movable clamp body and the V-shaped block, thereby achieving clamping; when the micro-small shaft parts are suitable for processing in the horizontal direction, if a center hole is reserved on the part, the part is placed between the top and the top seat, and the micro-small shaft parts are clamped by adjusting the position of the locking nut and the top seat, thereby achieving clamping. Taking block parts as an example again, for larger block parts, the movable clamp body can be moved back and forth to clamp the block parts between the V-shaped block and the precision jaw plate; for relatively small block parts, rectangular pressure blocks, studs and corresponding nuts can be used in combination to clamp block parts.

[0020] 3) The multifunctional clamp designed by the present invention is suitable for micro-small parts, with good clamping reliability and self-locking performance. For example, a spring and a locking nut are arranged on the top of the clamping device of the present invention to prevent the parts from loosening during the clamping process; for another example, a spring is also arranged on the replaceable clamping module to prevent the rotating pressure plate or the rectangular pressure block from loosening, which also has a self-locking function.

[0021] 4) The structure of the present invention can use the positioning block to align the workpiece when clamping the micro-small parts, which can reduce the auxiliary clamping time (such as the time for alignment and tool setting) and improve the production efficiency of the parts.

[0022] 5) The present invention is multifunctional and can be used for efficient clamping of parts such as micro shafts, plates, blocks, and complex curved surfaces. The corresponding main functional modules are adjustable and replaceable, and can ensure that the functional modules are easy to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a top view of the present invention;

[0024] Figure 2 yes Figure 1 AA view;

[0025] Figure 3 yes Figure 2 BB cross-sectional view;

[0026] Figure 4 yes Figure 2 CC section view;

[0027] Figure 5 It is the main view of the fixed clamp body;

[0028] Figure 6 It is the front view of the movable clamp body.

[0029] In the figure: 1-base, 2-pad, 3-slotted countersunk screw, 4-screw cover, 5-slotted cylindrical head screw, 6-locking nut, 7-spring, 8-top, 9-hexagonal cylindrical head screw, 10-top seat, 11-fixed clamp body, 12-V-shaped block, 13-taper pin, 14-stud stud, 15-nut, 16-spring, 17-module base plate, 18-precision jaw plate, 19-slotted countersunk screw, 20-movable clamp body, 21-stud stud, 22-spring washer, 23-nut, 24-square nut, 25-tightening handle, 26-screw, 27-flat key, 28-coupling, 29-handle, 30-drive nut, 31-slotted cylindrical head screw, 32-positioning block, 33-cylindrical stepped pin, 34-rotating pressure plate, 35-pad, 36-rectangular pressure block. DETAILED DESCRIPTION

[0030] In order to make the technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] This embodiment provides a multifunctional fixture for micro-milling of micro-small parts, such as Figure 1-Figure 6 As shown, it includes a base 1, a pad 2, a slotted countersunk screw 3, a screw cover 4, a slotted cylindrical head screw 5, a locking nut 6, a spring 7, a top 8, a hexagon socket cylindrical head screw 9, a top seat 10, a fixed clamp body 11, a V-shaped block 12, a conical pin 13, a stud 14, a nut 15, a spring 16, a module base plate 17, a precision jaw plate 18, a slotted countersunk screw 19, a movable clamp body 20, a stud 21, a spring washer 22, a nut 23, a square nut 24, a tightening handle 25, a screw 26, a flat key 27, a coupling 28, a handle 29, a drive nut 30, a slotted cylindrical head screw 31, a positioning block 32, a cylindrical step pin 33, a rotating pressure plate 34, a cushion block 35, and a rectangular pressure block 36.

[0032] The above-mentioned fixed clamp body 11 is arranged on the base 1, and a positioning slot is provided at each end of the base for fixing the base 1 to the corresponding milling machine. In order to facilitate the connection between the base 1 and the fixed clamp body 11 and reduce the friction and wear between the two, a pad 2 is provided on the upper surface of the base 1. The pad 2 is connected to the fixed clamp body 11 through 4 slotted cylindrical head screws. The pad 2 is also connected to the base 1 through a stud 21, a spring washer 22, a nut 23 and 4 slotted countersunk screws 3. This connection method can realize relative movement and rotation between the base 1 and the clamp body, so as to facilitate flexible clamping.

[0033] A screw rod 26 is provided on the right side of the movable clamp body 20, and a coupling 28 is sleeved on the extended end of the screw rod 26, and a driving nut 30 is provided at the end of the extended end; a threaded hole is provided on the driving nut 30, and a handle 29 is connected to the driving nut 30 through a threaded connection. By turning the handle 29, the screw rod 26 can be moved forward or backward, and the movable clamp body 20 can be driven to move forward or backward along the fixed clamp body 11 through the metal guide rail. The metal guide rail plays a role in horizontal positioning and relative movement, so that So as to realize the precise positioning and clamping of parts; a square nut 24 is arranged in the bottom groove of the fixed clamp body 11, and the outer surface of the screw 26 has a trapezoidal thread. The screw 26 is connected with the square nut 24 through the trapezoidal thread to play the role of transmitting power. In order to facilitate fastening and disassembly, the square nut 24 is connected to the fixed clamp body 11 by tightening the handle 25. A screw cover 4 for dust prevention is arranged on the screw 26, and the screw cover 4 is fixed to the fixed clamp body 11 by a slotted cylindrical head screw 5.

[0034] The fixed clamp body 11 is provided with a clamping device, which includes a top seat 10. The top seat 10 is provided with two left and right tops. The left top 8 is provided with a spring 7 and a locking nut 6 to prevent loosening during the clamping process of the parts, so that it can better clamp the parts to be clamped. The other top is welded into one with the top seat 10. The top seat 10 is connected to the fixed clamp body 11 of the clamp body through a hexagon socket head screw 9, which is convenient for installation, disassembly and adjustment. The locking nut 6, spring 7, top 8, hexagon socket head screw 9, and top seat 10 constitute a module for clamping a miniature shaft part with a center hole. The clamping length can be adjusted according to the actual working state, so that the designed clamp is fully functional. In addition, the pointed top seat 10 welded with a top can also be replaced with a three-jaw chuck.

[0035] A dovetail groove structure is provided at the left end of the above-mentioned fixed clamp body 11, and a dovetail structure is opened on the V-shaped block 12. The V-shaped block 12 is connected to the fixed clamp body 11 through the cooperation of the dovetail and the dovetail groove. A precision jaw plate 18 is provided at the left end of the movable clamp body 20, and a replaceable clamping module is provided between the V-shaped block 12 and the precision jaw plate 18, which module can be installed or removed at any time. The clamping module is composed of a module substrate 17, a cylindrical stepped pin 33, a rotating pressure plate 34, a pad 35, and a rectangular pressure block 36. An array of standard threaded holes is arranged on one side of the upper surface of the template substrate 17 to facilitate connection with the stud 14; a rotating pressure plate 34 is arranged on the other side; a stud 14 is arranged in the threaded hole, and the other end of the stud 14 is connected to the rotating pressure plate 34 or the rectangular pressure block 36, and is tightened by a matching standard nut 15. A pad 35 with a hole is also arranged on the threaded hole of the module substrate 17, which is used to pad the workpiece or the rectangular pressure block 36 to a suitable height. The cylindrical stepped pin 33 is used in conjunction with the hole on the module substrate 17 to position and limit the pad 35. The replaceable clamping module can be used for clamping the same type of micro-small parts, and can be quantitatively customized according to actual conditions. To facilitate installation and disassembly, the replaceable clamping module is connected to the clamp body via four conical pins 13, and the conical pins 13 play a positioning role to prevent the replaceable clamping module from moving during use.

[0036] The dovetail groove has a large upper opening and a small lower opening (with a certain taper, which can be set according to actual conditions). The V-shaped block 12 is matched with the fixed clamp body 11 on the clamp body through the dovetail groove. This matching method is not only conducive to improving the clamping accuracy and stability, but also avoids the use of additional threaded fasteners for connection. In addition to being used to clamp square workpieces, the V-shaped block 12 can also be used to clamp micro cylindrical parts or parts with partial cylindrical structural features. The size of the V-shaped block 12 can be adjusted or replaced according to actual conditions.

[0037] A positioning block 32 is provided on the side fixed clamp body 11 of the above-mentioned V-shaped block 12. The positioning block 32 is fixed to the fixed clamp body 11 of the clamp body by a slotted cylindrical head screw 31 to achieve rapid positioning and clamping of planar parts; a long groove is provided on the positioning block 32 to facilitate installation and adjustment according to actual conditions.

[0038] The working process of the present invention is as follows:

[0039] The multifunctional clamp of the present invention is placed on the working table of a machine tool, and is fixed to the corresponding machine tool through bolts and the positioning slots on the base 1 .

[0040] The clamping process of block-shaped parts: When clamping block-shaped parts, if the clamping module is installed on the clamp body, it is necessary to first pull out the conical pin 13, remove the clamping module, and then clamp. Turn the handle 29 on the right side of the multifunctional clamp, and the power is transmitted to the screw 26 through the flat key 27 and the coupling 28, and the screw 26 realizes reciprocating motion. Since the block nut 24 is connected to the movable clamp body 20 by tightening the handle 25, the outer thread on the screw 26 and the inner thread on the block nut 24 cooperate to drive the movable clamp body 20 to reciprocate. Since a metal guide rail is provided between the fixed clamp body and the movable clamp body, the clamping and disassembly functions are easily realized. Finally, the block-shaped parts are clamped between the V-shaped block 12 and the precision jaw plate 18. After the parts are processed, the clamping device or the clamping device is released to take out the processed workpiece.

[0041] The clamping process of shaft parts: When the micro shaft parts are suitable for processing in the vertical direction, place the parts in the notch of the V-shaped block 12, rotate the handle 29, and form a clamping force between the movable clamp body 20 and the V-shaped block 12 to achieve clamping. When the micro shaft parts are suitable for processing in the horizontal direction, if a center hole is reserved on the parts, place the parts between the top 8 and the top seat 10, and clamp the micro shaft parts by adjusting the position of the locking nut 6 and the top seat 10 to achieve clamping.

[0042] The clamping process of plate parts or stepped surface parts: When clamping plate parts or stepped surface parts, first rotate the handle 29 to separate the movable clamp body 20 and the fixed clamp body 11 to the appropriate position, then place the replaceable clamping module on the clamp body, position the replaceable clamping module through the conical pin 13, loosen the nut 15, place the plate parts or stepped surface parts on the module base plate 17, screw the stud 14 into the standard threaded hole on the module base plate 17, place the spring 16, use the rotating pressure plate 34 to press the plate parts, tighten the nut 15, and the corresponding parts are clamped on the clamp body.

[0043] The above embodiments are used to further illustrate the present invention, but the present invention is not limited to these specific implementation processes, but should include all implementation schemes that fall within the scope of the patent authorization requirements of the present invention.

Claims

1. A multifunctional fixture for fine milling of micro-small parts, comprising a base (1), wherein a fixed clamp body (11) and a movable clamp body (20) are arranged on the base (1), a metal guide rail is arranged between the fixed clamp body (11) and the movable clamp body (20) so that the movable clamp body (20) can slide back and forth along the fixed clamp body (11), a right-side top of the clamping device on the fixed clamp body (11) is welded to the top seat (10), and the top seat (10) is connected to the fixed clamp body (11) by a hexagon socket head screw (9), characterized in that: The right side of the movable clamp body (20) is connected to a protruding screw rod (26), a coupling (28) is sleeved on the protruding end of the screw rod (26), and a driving nut (30) is arranged at the end of the protruding end; a square nut (24) is arranged in the bottom groove of the fixed clamp body (11), the outer surface of the screw rod (26) is provided with a trapezoidal thread, the screw rod (26) is connected to the square nut (24) through the trapezoidal thread, and the square nut (24) is fixedly connected to the fixed clamp body; the driving nut (30) is connected to a handle (29), so that the screw rod (26) drives the movable clamp body (20) to move forward or backward; A V-shaped block (12) is arranged at the left end of the fixed clamp body (11), a precision jaw plate (18) is arranged at the left end of the movable clamp body (20), and a replaceable clamping module is arranged between the V-shaped block (12) and the precision jaw plate (18), the clamping module comprising a module base plate (17), a cylindrical stepped pin (33), a cushion block (35) and a rectangular pressing block (36); an array of threaded holes is arranged on one side of the upper surface of the template base plate (17), and a rotating pressing plate (34) is arranged on the other side; the A stud (14) is arranged in the threaded hole, and the other end of the stud (14) is connected to the rotating pressure plate (34) or the rectangular pressure block (36) and is tightened by a matching standard nut (15). A pad (35) with a hole is also arranged on the threaded hole of the module base plate (17) for padding the workpiece or the rectangular pressure block (36) to a suitable height. The cylindrical stepped pin (33) is used in conjunction with the hole on the module base plate (17) for positioning and limiting the pad (35).

2. The multifunctional fixture for micro-milling of micro-small parts according to claim 1, characterized in that: A dovetail groove structure is provided at the left end of the fixed pliers body (11), a dovetail structure is provided on the V-shaped block (12), and the V-shaped block (12) is connected to the fixed pliers body (11) through the cooperation of the dovetail and the dovetail groove.

3. A multifunctional fixture for micro-milling of micro-small parts according to claim 1 or 2, characterized in that: A positioning block (32) is provided on the side fixed clamp body (11) of the V-shaped block (12), and the positioning block (32) is fixed to the fixed clamp body (11) by means of a slotted cylindrical head screw (31).

4. The multifunctional fixture for micro-milling of micro-components according to claim 3 is characterized in that: A backing plate (2) is provided between the base (1) and the fixed clamp body (11); the backing plate (2) is connected to the fixed clamp body (11) via four slotted cylindrical head screws, and is connected to the base (1) via studs (21) and four slotted countersunk head screws (3).

5. The multifunctional fixture for micro-milling of micro-small parts according to claim 4 is characterized in that: The block nut (24) is connected to the movable pliers body (20) by tightening the turning handle (25).

6. The multifunctional fixture for micro-milling of micro-components according to claim 5 is characterized in that: The clamping module is connected to the fixed clamp body (11) via four conical pins (13).

7. The multifunctional fixture for micro-milling of micro-small parts according to claim 6 is characterized in that: The positioning block (32) is provided with a long slot.

8. The multifunctional fixture for micro-milling of micro-components according to claim 7 is characterized in that: The screw rod (26) is provided with a screw rod cover (4) for preventing dust, and the screw rod cover (4) is fixed to the fixed clamp body (11) by means of a slotted cylindrical head screw (5).

9. The multifunctional fixture for micro-milling of micro-components according to claim 8, characterized in that: A spring (7) and a locking nut (6) are provided on the left top of the clamping device on the fixed clamp body (11) to prevent the parts from loosening during the tightening process.

10. The multifunctional fixture for micro-milling of micro-components according to claim 2, characterized in that: The dovetail groove has a large upper opening and a small lower opening with a taper.

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