High-precision indexing clamp for linear cutting of thin-wall parts
By designing a high-precision indexing fixture for wire EDM of thin-walled parts, the accuracy and efficiency problems caused by resonance in the machining of multiple slots in thin-walled parts were solved, achieving high-precision and low-cost machining results.
Patent Information
- Application Number
- CN202423247484.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-27
AI Technical Summary
During the machining of multiple grooves in thin-walled parts, vibration caused by resonance between the workpiece and the cutting tool makes it impossible to effectively guarantee machining accuracy, resulting in long machining cycles, high costs, and low productivity.
A high-precision indexing fixture for wire EDM of thin-walled parts is adopted, including components such as a working base plate, a high-precision indexing head, a tail top, a tail top cover, a cutting fluid baffle, and a handle. The design of the high-precision indexing head and tail top allows the workpiece to be clamped by the high-precision indexing head and pressed firmly by the tail top. The accuracy is checked with the cutting fluid baffle and Morse taper calibration bar to ensure machining accuracy and stability.
It improves the precision of one-time molding of products, reduces production costs and cycle time, avoids mutual vibration between workpieces and cutting tools, and improves production efficiency and yield.
Smart Images
Figure CN223848254U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of clamps, and relates to a high-precision indexing clamp for wire cutting of parts. BACKGROUND
[0002] In the slotting process of thin-walled parts, whether it is ordinary turning or milling, or the current numerical control machine tool and multi-axis machining center, resonance of the workpiece and the tool will cause relative vibration, and the machining precision cannot be effectively guaranteed. If the workpiece is machined in multiple steps, the machining cycle will be long, the cost will be high, and the production rate will be low.
[0003] In the slotting process of thin-walled parts, resonance of the workpiece and the tool will cause vibration, and effective machining cannot be performed. In particular, the same thin-walled part is machined at multiple locations, and many seemingly advanced devices and methods cannot play their own strengths in the milling process, and the machining cycle is long, the cost is high, and the production rate is low. SUMMARY
[0004] The present application provides a high-precision indexing clamp for wire cutting of thin-walled parts, which solves the problem of multiple slotting of thin-walled parts, simplifies the production process, reduces production cost and production cycle, and improves the machining precision of products.
[0005] The technical solution adopted by the present application to solve the problem is as follows:
[0006] A high-precision indexing clamp for wire cutting of thin-walled parts, characterized in that it comprises a work base plate, a high-precision indexing head, a tail top, a tail top cover, a cutting fluid baffle, and a handle. The work base plate is parallel between the upper and lower working planes, has a threading opening slot in the middle, and has a cutting fluid collection groove on the upper plane. The work base plate is fixed on the guide rail of the wire cutting machine with a pressing plate. T-shaped handles are installed at both ends of the work base plate. The high-precision indexing head adopts an indexing chuck with a precision of 0.01 degrees. The tail top is used to tighten the tail top cover after the workpiece is clamped by the indexing chuck jaw. The tail top cover is a stepped cylindrical structure, including a large-diameter cylinder and a small-diameter cylinder. The diameter of the large-diameter cylinder is larger than the outer step surface of the contact part of the machined thin-walled part. The small-diameter cylinder can be fitted into the transition between the contact part of the machined thin-walled part and the inner circle. The height of the small-diameter cylinder is smaller than the depth of the inner step of the contact part of the machined thin-walled part. The cutting fluid baffle is located in the front part of the workpiece.
[0007] Further, a mode taper verification rod is also included. The Mohs taper verification rod is installed in the indexing head to verify the precision of the indexing head.
[0008] Further, the handle is in a T-shaped structure, and the T-shaped handle is screwed on the work base plate at the understanding end and is connected with the work base plate through screw threads.
[0009] Further, the high-precision indexing head body is made of FC30 cast iron, and can divide 2, 4, 6, 8, 12, 24, etc. parts from 0-90°, and has positive claws and reverse claws.
[0010] The technical effect of the thin-wall part wire cutting high-precision indexing clamp is as follows:
[0011] Through the application of the wire cutting high-precision indexing clamp, indexing and machining can be effectively integrated, so that the one-time forming precision of products is improved, the production cost is reduced, and the production cycle is shortened.
[0012] The workpiece is clamped by the high-precision three-claw reading disc (repeated positioning accuracy 0.01°), and the other end is fixed by a center. The whole tool is fixed on the guide rail of the wire cutting machine tool by a pressing plate, and two through grooves of the part can be cut at one time. The mutual vibration of the workpiece and the cutter during ordinary milling and machining center machining is avoided. Due to the limitation of the length of the cutter, the cutter machining type machine tool has a limited cutting amount at one time, and the accuracy is low after multiple machining, the efficiency is low, and the yield is greatly reduced.
[0013] The overall structure is solid and reliable, and the flatness and parallelism of the working base plate need to be up to and higher than the machining precision requirement of the workpiece.
[0014] The high-precision indexing head bearing, clamping force, etc. meet and are greater than the required bearing and clamping force of the machined workpiece, and the indexing accuracy can meet the machining accuracy requirement of the workpiece.
[0015] The tail top and the high-precision indexing head are from the same manufacturer to ensure mutual matching and consistency.
[0016] The Morse taper verification rod should be produced by a professional manufacturer to avoid misjudgment of the overall accuracy of the workpiece due to the error of the detection tool. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 Schematic view of the thin-wall part wire cutting high-precision indexing clamp
[0018] Figure 2 Schematic view of the tail top cover
[0019] 1. Working base plate 2. High-precision indexing head 3. Cutting fluid baffle 4. Workpiece schematic 5. Tail top cover 6. Tail top 7. Handle DETAILED DESCRIPTION
[0020] The thin-wall part wire cutting high-precision indexing clamp of the utility model, comprising a working base plate, a high-precision indexing head, a tail top, a tail top cover, a Morse taper verification rod, a cutting fluid baffle, and a handle.
[0021] The working base plate is made of 45# plate material after quenching and tempering treatment. Through quenching and tempering treatment, the internal stress of the whole working base plate material can be released, and the overall machinability and toughness of the material are improved. As a high-precision clamp, the precision of the base plate determines the precision of the whole clamp. The upper and lower working planes of the working base plate are processed by precision grinding to ensure the parallelism and flatness between the two working planes. The through opening slot is opened according to the cutting length and width of the workpiece. The cutting fluid collecting groove is machined on the working base plate to ensure that the cutting fluid flows back to the wire cutting machine as much as possible from the predetermined position. In order to ensure the precision of the whole clamp, the clamp is connected with the wire cutting equipment as a whole. In order to facilitate the overall disassembly and movement, handles are installed at both ends of the base plate. T-shaped handles are installed through threaded holes to facilitate the use of the clamp.
[0022] The high-precision dividing head adopts a high-precision dividing chuck with a dividing accuracy of 0.01 degrees produced by a professional manufacturer. The main body is made of FC30 cast iron and can quickly divide 2, 4, 6, 8, 12, 24 parts from 0-90°. It is equipped with positive and negative claws and a quick positioning honeycomb plate.
[0023] The tail top has a height adjustment function and is used to tightly press the workpiece after being clamped by the dividing chuck jaw. The auxiliary three-jaw alignment is used to prevent the workpiece from "bowing down" due to careless operation.
[0024] The tail top cover is made of a slightly softer metal material than the processed part. In this scheme, 7A04 material is used. The whole is a flange structure (see Figure 2 ), the size A is determined according to the size of the outer step surface of the contact part of the processed thin-walled part, which is slightly larger than the size of the outer circle of the outer step surface; the size B is determined according to the inner diameter of the contact part of the processed thin-walled part, and the two are fitted in a transition manner; the size D is determined according to the step depth of the step hole, which is slightly smaller than the step depth; the size C relates to the strength and rigidity of the whole top cover. Therefore, within the allowable range of the whole tool assembly relationship, it is possible to be as solid as possible; the center hole is matched according to the taper of the tail top.
[0025] The mode taper checking rod provides a verification basis for the precision of the whole tool. After the whole tool is assembled, used for a long time, not used for a long time, and after the tool is finished and lubricated, the precision of the whole mechanism can be checked by installing the Morse taper checking rod in the dividing head and then checking the table.
[0026] The cutting fluid baffle is used to prevent the high-precision dividing head from being blocked and hindered in rotation due to cutting fluid splashing and dripping during wire cutting. It ensures that the dividing head is in a relatively dry working environment as much as possible, and makes the whole working environment cleaner and neater.
[0027] The handle is T-shaped structure, made of φ10 steel rod, and is screwed at the end of the T-shaped handle on the work base plate and connected with the base plate. The handle is put on the work surface of the wire cutting machine when the whole tool is put on or taken off the work surface. The handle is cleaned and wiped every time when the cutting liquid drops on the handle.
[0028] The working principle of the utility model is:
[0029] The work base plate is pressed by the self-pressing plate of the wire cutting machine, so that the work base plate and the wire cutting clamp are parallel and stable. The high-precision indexing head is adjusted to the appropriate position, and then the workpiece is pre-clamped. The position of the workpiece is coarsely adjusted, and the magnetic table placed on the work base plate is used to pre-adjust the axial and radial runout of the workpiece to a relatively small error range. The tail cover is put in, and the workpiece is pre-tightened by the tail. The workpiece is adjusted by the tail, and the workpiece is found by the table, so that the axial and radial runout of the workpiece is within the allowable machining range. The workpiece is adjusted by tapping the copper rod or aluminum rod, and the clamping force and the tightening force are adjusted while the table is tapped, so that the axial and radial runout of the workpiece reaches the allowable tolerance range of machining. The high-precision indexing head is locked, and the tail is locked. The cutting liquid baffle is installed, and the wire cutting machining is started.
[0030] The utility model is applied to the shell assembly project produced in a workshop of the company. Through practical verification, the utility model completely achieves the design expectation. Two batches of 100 parts are machined. Compared with outsourcing machining of the machining center, the utility model reduces outsourcing cost, transportation, labor cost, time cost and other costs. In the use year, the annual machining cycle is reduced by 80 days compared with the original, and the machining cost is reduced by 200,000 yuan.
Claims
1. A thin-walled part wire cutting high-precision indexing fixture, characterized in that, It comprises a work base plate (1), a high-precision indexing head (2), a tail top (6), a tail top cover (5), a cutting fluid baffle (3), and a handle (7). The work base plate is parallel between the upper and lower work planes, has a threading opening slot in the middle, and has a cutting fluid collecting groove on the upper plane. The high-precision indexing head adopts an indexing chuck with an indexing accuracy of 0.01 degrees. The tail top is used to tightly press the tail top cover after the workpiece is clamped by the indexing chuck. The tail top cover is a stepped cylindrical structure, comprising a large-diameter cylinder and a small-diameter cylinder. The cutting fluid baffle is located in the front part of the workpiece.
2. The high-precision indexing fixture for thin-walled parts according to claim 1, characterized in that, The work base plate is made of 45# plate material after quenching and tempering treatment.
3. The high-precision indexing fixture for thin-walled parts according to claim 1, characterized in that, It also includes a mode taper checking rod, which is used to check the accuracy of the indexing head by installing a Morse taper checking rod in the indexing head.
4. The high-precision indexing fixture for thin-walled parts according to claim 1, characterized in that, The handle is a T-shaped structure, and the T-shaped handle is screwed on the end of the work base plate and connected with the work base plate through threads.
5. The high-precision indexing fixture for thin-walled parts according to claim 4, characterized in that, The handle is made of φ10 steel rod.
6. The high-precision indexing fixture for thin-walled parts according to claim 1, characterized in that, The high-precision indexing head body is made of FC30 cast iron, and can be divided into 2, 4, 6, 8, 12, 24 parts from 0-90°, with positive and negative claws.
7. The high-precision indexing fixture for thin-walled parts according to claim 1, characterized in that, The tail top cover is made of 7A04 material.
8. The high-precision indexing fixture for thin-walled parts according to claim 1, characterized in that, The high-precision indexing head clamping jaw pre-clamps the workpiece, and the tail top pre-tightens the workpiece.
9. The high-precision indexing fixture for thin-walled parts according to claim 1, characterized in that, A magnetic table is placed on the work base plate to adjust the axial and radial runout of the workpiece.