CN116551327A - A processing method for electronic brake worm shaft - Google Patents

Abstract

A method for processing an electronic brake worm shaft, comprising the following steps: step (1) material selection: selecting long columnar material; step (2) turning the step and hole finishing hole: step (3) turning and cutting off the step at the other end; step (4) ) Rough machining of the worm shaft; step (5) finishing of the worm shaft; step (6) step finishing; step (7) cleaning and antirust: cleaning and antirusting the product. The invention can be produced in batches, reduces the processing cost, and ensures the product quality; the whole processing process realizes the unification of the measurement reference and the processing positioning reference, so that the quality is stable and reliable.

Description

A kind of electronic brake worm shaft processing method

technical field

The invention belongs to the field of mechanical processing, in particular to the processing of electronic brake worm shafts.

Background technique

Nowadays, with the rapid development of the automobile industry, the brake technology has gradually changed from the original vacuum booster brake to the electronic brake system. Electronic braking system is also widely used as a standard product of L2 automatic driving. The worm shaft is the core component of the electronically controlled braking system. Guarantee DIN standard level 4, worm surface roughness below 0.003, etc.

At present, most of the worm shafts produced on the market are processed by CNC lathes. This method has low machining accuracy, low efficiency, and cannot meet the product’s hole diameter, worm accuracy, step diameter, and screw surface roughness. It mainly depends on selecting qualified products from mass production. In addition, after the worm surface is processed, manual polishing is required to cause low production efficiency. Therefore, the current production method is a high-cost production method both in terms of quality and efficiency.

Contents of the invention

Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a worm shaft machining method that can unify the measurement reference and the processing positioning reference, have stable and reliable quality, and can realize mass production.

The electronic brake worm shaft processing method comprises the following steps:

Step (1) material selection: select columnar long material;

Step (2) Turning step and hole finishing hole: turn one end of the material to be processed in step (1) to the required size by clamping one end of the CNC lathe, that is, the diameter of the rough machining step and the rough drilling and fine reaming Processing, to ensure that the hole diameter tolerance is 0.02 mm;

Step (3) Turning the other end step and cutting: the product processed in step (2) is clamped by the other end of the CNC lathe, and the CNC lathe cuts the product to the required size;

Step (4) Rough machining of the worm shaft: clamp the step of step (3) and the hole of the top fixing step (2), and process the cylindrical part of the material to be processed obtained after step (3) into the required size, which is For the worm part, the cylindrical rough milling worm is processed;

Step (5) Finishing the worm shaft: Clamping and fixing through the top holes at both ends, clamping the step after step (3), and grinding the worm obtained after step (4) to the required size;

Step (6) step finish machining: the tops at both ends are fixed, and the steps obtained after step (2) and step (3) are processed are subjected to finishing grinding;

Step (7) cleaning and antirust: cleaning and antirusting the product.

Preferably, in step (1), the selected material is long columnar material with a length of 3 m, the diameter tolerance of the long columnar material is ±0.02 mm, and the surface is in a drawn state.

Preferably, in step (2), use a CNC lathe to process the columnar long material, and process the material into a stepped shaft with a step diameter tolerance of 0.04mm, and reserve a finishing allowance of 0.1mm for the step.

Preferably, in step (3), the stepped shaft obtained in step (2) is cut off after being clamped by the other end of the CNC lathe, and the other end step is processed after cutting. The step is reserved for a finishing allowance of 0.1mm, and A process hole is processed at the end, and the processing length tolerance is ±0.05mm.

Preferably, in step (4), the step datum processed in step (3) is clamped by the jacket, and the hole at one end is processed in step (2) of top fixing, and then the cylindrical surface is processed to 40mm by whirling milling cutter The long worm makes the benchmark of milling worm and grinding worm uniform, the worm three-needle diameter is reserved for finishing allowance of 0.4mm, the runout tolerance of worm is within 0.05mm, the precision of worm is DIN8, and the precision of worm is guaranteed to be DIN 8.

Preferably, in step (5), the holes at both ends processed in step (2) and step (3) are fixed as the processing reference, the grinding wheel is trimmed to the parameters required by the worm, and the surface of the worm is ground and finished with the grinding wheel , so that the measurement standard and the processing standard are unified, the precision of the worm is DIN4, and the surface roughness of the worm is below 0.003 mm.

Preferably, in step (6), use the top ends of the CNC cylindrical grinder to fix the holes at both ends processed in steps (2) and (3) as the processing reference, and ensure that the tolerance of the diameter of the step is 0.004 mm.

Preferably, in step (7), an ultrasonic cleaning machine is used to clean and prevent rust on the surface of the product.

The beneficial effect of the present invention compared with prior art is:

(1) It can be produced in batches, reducing processing costs and ensuring product quality;

(2) The whole processing process realizes the unification of measurement reference and processing positioning reference, so that the quality is stable and reliable.

Description of drawings

Fig. 1 is the schematic diagram of step (1) of the present invention;

Fig. 2 is the schematic diagram of step (2) of the present invention;

Fig. 3 is the schematic diagram of step (3) of the present invention;

Fig. 4 is the schematic diagram of step (4) of the present invention;

Fig. 5 is the schematic diagram of step (5) of the present invention;

Fig. 6 is the schematic diagram of step (6) of the present invention;

Fig. 7 is a schematic diagram of the finished product of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

Example 1

As shown in Figures 1-7, the electronic brake worm shaft processing method includes the following steps:

Step (1) material selection: select the long columnar material with a length of 3m, the diameter tolerance of the long columnar material is ±0.02 mm, and the surface is in the state after drawing;

Step (2) Turning step and hole finishing hole: turn one end of the material to be processed in step (1) to the required size by clamping one end of the CNC lathe, that is, the diameter of the rough machining step and the rough drilling and fine reaming Machining, the hole diameter tolerance is guaranteed to be 0.02 mm, the step diameter tolerance is 0.04 mm, and the step is reserved for a finishing allowance of 0.1 mm;

Step (3) Turning and cutting the other end of the step: clamp the product processed in step (2) through the other end of the CNC lathe, use the CNC lathe to cut off the step shaft obtained in step (2), and process the other end of the step after cutting , 0.1mm of finishing allowance is reserved for the step, and a process hole is processed at the end of the shaft, and the processing length tolerance is ±0.05mm;

Step (4) Rough machining of the worm shaft: use the hydraulic jacket to clamp the steps of step (3) and the top to fix the hole of step (2) through the cyclone milling machine, and the cylindrical surface of the material to be processed obtained after step (3) Part of it is processed to the required size, that is, the worm part, and the cylindrical rough milling worm is processed; the three-pin diameter of the worm is reserved for finishing machining of 0.4mm, to ensure that the runout tolerance of the worm is within 0.05mm, and the precision of the worm is DIN8;

Step (5) Finish machining of the worm shaft: Clamp and fix the top holes at both ends of the CNC worm grinder, and fix the two ends of the holes processed in steps (2) and (3) as the processing reference through the top ends of the gear grinding machine. The jacket clamps the stepped part after step (3), and the grinding wheel is trimmed to the parameters required by the worm, and the worm is ground and finished with the grinding wheel on the surface of the worm obtained after step (4), so as to ensure the precision of the worm DIN4, The surface roughness of the worm is less than 0.003mm;

Step (6) Finishing of the step: use the CNC cylindrical grinding machine to fix the tops at both ends, and finish grinding the step obtained after step (2) and step (3), so as to ensure that the diameter tolerance of the step is 0.004 mm;

Step (7) Cleaning and antirust: Use a fully automatic ultrasonic cleaner to clean and prevent rust on the product.

Claims (8)

1. The processing method of the worm shaft of the electronic brake comprises the following steps: selecting materials in the step (1): selecting a columnar long material; step (2) turning a step and a hole finish machining hole: turning one end of the material to be processed in the step (1) into a required size through one-time clamping of a jacket at one end of a numerical control lathe, namely, rough machining the diameter of a step, rough drilling and finish reaming, and ensuring the aperture tolerance to be 0.02 millimeter: turning the other end step and cutting off: clamping the product processed in the step (2) through a jacket at the other end of the numerical control lathe, and cutting the product into the required size by the numerical control lathe; step (4) rough machining of the worm shaft: clamping the step of the step (3) and the hole of the center fixing step (2), processing the cylindrical surface part of the material to be processed obtained after the step (3) into a required size, namely a worm part, and processing a cylindrical surface rough milling worm; and (5) finishing the worm shaft: clamping and fixing the two ends of the worm through center holes, clamping the step part after the step (3), and grinding the worm obtained after the step (4) into a required size; step (6) step finish machining: fixing two end tips, and carrying out finish machining grinding on the steps obtained after the steps (2) and (3) are processed; and (7) cleaning and rust preventing: and cleaning and rust preventing the product.

2. The method for machining the worm shaft of the electronic brake according to claim 1, wherein: in the step (1), the selected material is columnar long material, the length is 3m, the diameter tolerance of the columnar long material is +/-0.02 mm, and the surface is in a pulled state.

3. The method for machining the worm shaft of the electronic brake according to claim 1, wherein: in the step (2), a numerical control lathe is used for processing the columnar long material, the material is processed into a step shaft, the diameter tolerance of the step is 0.04 mm, and the finishing amount of the step is reserved for 0.1 mm.

4. The method for machining the worm shaft of the electronic brake according to claim 1, wherein: in the step (3), the step shaft obtained in the step (2) is cut after being clamped by a jacket at the other end of the numerically controlled lathe, the step at the other end is machined after cutting, the step is reserved with a finish machining amount of 0.1mm, and a process hole is machined at the shaft end, so that the machining length tolerance is +/-0.05 mm.

5. The method for machining the worm shaft of the electronic brake according to claim 4, wherein: in the step (4), the step datum processed in the step (3) is clamped through a jacket, a center is used for fixing the hole processed in the step (2), a cylindrical surface is processed into a worm with the length of 40 mm by using a whirlwind milling cutter, so that the milling worm datum and the grinding worm datum are unified, the three-needle diameter of the worm is reserved with a finish machining amount of 0.4 mm, the jumping tolerance of the worm is within 0.05mm, the precision DIN8 level of the worm is ensured, and the precision of the worm is ensured to be in the DIN8 level.

6. The method for machining the worm shaft of the electronic brake according to claim 1, wherein: in the step (5), the two end holes processed in the step (2) and the step (3) are fixed as processing references, a grinding wheel is trimmed to the parameters required by the worm, the grinding wheel is used for grinding and finishing the surface of the worm, so that the measuring references and the processing references are unified, the precision DIN4 level of the worm is realized, and the surface roughness of the worm is less than 0.003 millimeter.

7. The method for machining the worm shaft of the electronic brake according to claim 1, wherein: in the step (6), two end apexes of a numerical control cylindrical grinding machine are used for fixing the two end holes processed in the step (2) and the step (3) as processing references, and the diameter tolerance of the step is ensured to be 0.004 mm.

8. The method for machining the worm shaft of the electronic brake according to claim 1, wherein: in the step (7), the ultrasonic cleaner is adopted to clean and rust-proof the surface of the product.