CN107813112A - Posterior cervical enabling board machining process - Google Patents

Abstract

The present invention provides a kind of posterior cervical enabling board machining process, including the step of stock, turning center, wire cutting and cleaning.Product is processed and formed at one time using turning center, the step of eliminating bending forming compared with original technique, product material interior tissue will not be destroyed, so as to which disqualification rate be substantially reduced, using disposable processing, more technological equipment demand is saved, substantially reduces manufacturing cost.

Description

Processing Technology of Posterior Cervical Door Opening Panel

technical field

The invention relates to the technical field of medical devices, in particular to a processing technology of a posterior cervical door opening plate.

Background technique

Laminoplasty, as an emerging surgery for the treatment of spinal stenosis, has become an excellent surgery for this disease. At present, foreign medical device manufacturers in the market have already launched such products and instruments, and domestic brands have also launched laminoplasty one after another. The product.

However, due to the complex shape of the product, it is extremely difficult to process, especially the surface quality of the product and the destruction of the internal material structure of the product are not in place, and the product quality cannot be guaranteed.

The traditional manufacturing process of the posterior cervical door opening panel is as follows:

Material preparation: prepare materials according to the length, width and height dimensions of 44×30×0.8/4 pieces, pay attention to the rolling direction;

Wire cutting: Clamp the blank to the equipment, program according to the layout diagram, the processing parameters are: the current is 13A, the processing method is to cut one and repair two, to ensure the surface roughness; as shown in Figure 1;

Machining center: use D2 end mill to process the bottom hole, use D6 ball mill to process the spherical surface of the waist groove, the parameters of the processing settings are the same, the spindle speed is 4000m/min, the cutting amount is 0.1mm, and the cutting amount is 0.05mm/s , the processing methods are contour edge cutting and spot hole processing, as shown in Figure 2;

Bending forming: As shown in Figure 3, the fitter bends according to the tooling body shown in the figure, a total of 2 times of bending, resulting in 2 bending points, and the internal structure of the product is severely damaged;

Fitter: Grinding the machining burr of the product and blunting the edge of the product;

Cleaning: Clean the grease and dirt on the surface of the product.

Among them, the bending forming process has great risks in processing. As shown in Figure 3, there are two bending points on the posterior cervical door opening: bending point 1 and bending point 2. At the bending point, the material The risk of internal organization being destroyed is extremely high. Through professional testing methods, at least 30% of the products produced are substandard products. The main reason is that the internal organization is damaged by bending and stamping.

Contents of the invention

The technical problem to be solved by the present invention is: in order to overcome the disadvantages of the prior art that the bending and forming process has a great risk of destroying the internal structure of the material and a high rate of product failure, the present invention provides a processing technology for opening the posterior cervical spine.

The technical solution to be adopted in the present invention to solve the technical problem is: a process for processing the posterior cervical door opening plate, comprising the following process steps:

Material preparation: The blank is made of titanium rods with a diameter of φ16～φ20, the length of which is between 2 meters and 3 meters, and the mass percentage of Ti is ≥98.71%. The part out is shorter, and the rigidity of product processing is better guaranteed;

Turning center: Use a jacket whose diameter matches the titanium rod to clamp the blank titanium rod and fix it on the turning center, and then divide the blank into three sections according to the bending position of the door opening plate, (respectively the beginning section, the middle section and the end section Sections,) section by section according to the order of rough machining shape, finishing shape and machining ball hole;

Rough machining shape, use D6 end mill for rough machining of product shape, and the spindle speed is V11, the cutting amount is A11, the cutting amount is B11, the processing method is contour bottom edge processing, and there is 0.5mm left after processing. quantity;

Finishing the shape, using a D2 end mill to finish the product shape, and the spindle speed is V12, the cutting amount is A12, the cutting amount is B12, and the processing method is contour edge processing to complete the processing of product thickness;

To process the ball hole, use D6 ball milling cutter to process the ball hole, and the spindle speed is V13, the cutting amount is A13, the cutting amount is B13, the processing method is point hole processing, and the processing of the mounting holes on each section is completed;

And the spindle speed satisfies V11<V12=V13, the cutting amount satisfies A11<A12<A13, and the cutting amount satisfies B11>B12=B13;

When the last section of ball hole processing is completed, the product is cut off with a D2 end mill;

The process of this turning center adopts a step-by-step processing method. Since the protruding part of the product is shorter during processing, the rigidity of the product is better guaranteed. Compared with the old process, the product quality is significantly improved, and there will be no surface chatter marks. The surface quality and The size is well controlled.

Wire cutting: the cut product is clamped by clamping tool, and the tail shape is processed by wire cutting;

Clean, clean the grease and dirt on the surface of the product. Basic process: ultrasonic cleaning→manual cleaning→2~3 times of water change and washing→circulation, adding ultrasonic cleaning, so that the fine grease of the product can be completely removed, and the product quality can be improved.

Preferably, when the diameter of the titanium rod is φ16, the diameter of the jacket is φ16.2; when the diameter of the titanium rod is φ20, the diameter of the jacket is φ20. The diameter of the jacket is equal to or slightly larger than the titanium rod to ensure that the titanium rod can be clamped.

The beneficial effects of the present invention are: the present invention provides a posterior cervical door opening process, which integrates the technological process and eliminates the risky bending process.

In the existing technology, in the bending and forming process, two attached tooling should be manufactured; after the improvement, there is no need for tooling manufacturing, and the standard jacket of the equipment is directly used for processing, and the product is basically processed and formed at one time in the turning center process, without the need to follow the traditional process. More fixtures are designed, and the manufacturing cost is reduced.

There is no need to worry about the internal tissue damage of product materials, thereby greatly reducing the failure rate and improving the company's benefits. The invention can control the destruction of the internal material structure and the surface quality of the product in place, and the product quality is guaranteed; one-time processing is adopted, which saves the need for more process equipment and greatly reduces the manufacturing cost.

Description of drawings

The present invention will be further described below in conjunction with drawings and embodiments.

Fig. 1 is a schematic diagram of the wire cutting process in the prior art;

Fig. 2 is a schematic diagram of the machining center process in the prior art;

Fig. 3 is a schematic diagram of the bending forming process in the prior art;

Fig. 4 is a schematic diagram of the process of the turning center of the present invention;

Fig. 5 is a schematic diagram of the wire cutting process of the present invention.

In the figure: 1. Clamping tooling, 2. Parts to be processed, 3. Beginning section, 4. Middle section, 5. End section.

Detailed ways

The present invention will be described in detail in conjunction with accompanying drawing now. This figure is a simplified schematic diagram only illustrating the basic structure of the present invention in a schematic manner, so it only shows the components relevant to the present invention.

Embodiment one:

As shown in Fig. 4 and Fig. 5, a kind of cervical spine posterior road door-opening processing technology of the present invention, material preparation:

The blank selects a titanium rod with a diameter of φ16～φ20, and its length is between 2 meters and 3 meters, in which the mass percentage of Ti is ≥98.71%, and the length of the titanium rod is far greater than the length of the door opening plate. The part is shorter, and the rigidity of product processing is better guaranteed;

In this embodiment, the blank is a rod (φ16～φ20)×(2000-3000)/(80-100), that is, the diameter of the polished rod is 16mm-20mm, the length is 2-3 meters, and a total of 80-100 finished door opening panels are produced ;

Turning center: Use a jacket whose diameter matches the titanium rod to clamp the blank titanium rod and fix it on the turning center, and then divide the blank into three sections according to the bending position of the door opening plate, namely the initial section 3, the middle section 4 and the The tail section 5 is processed in three steps step by step according to the order of rough machining shape, finishing shape and machining ball hole;

Step 1 Processing start section 3:

Rough machining shape, use D6 end mill for rough machining of product shape, and spindle speed V11 is 2500m/min-3500m/min, preferably 3000m/min, cutting amount A11 is 0.25mm-0.35mm, preferably 0.3mm, The amount B11 is 0.05mm-0.15mm, preferably 0.1mm, and the processing method is equal-height bottom edge processing, leaving a margin of 0.5mm after processing;

Finishing the shape, use D2 end mill to finish the product shape, and the spindle speed V12 is 3500m/min-4500m/min, preferably 4000m/min, the cutting amount A12 is 0.15mm-0.25mm, preferably 0.2mm, The amount B12 is 0.05mm-0.1mm, preferably 0.05mm, and the processing method is contour edge processing to complete the processing of product thickness;

To process the ball hole, use D6 ball milling cutter to process the ball hole, and the spindle speed V13 is 3500m/min-4500m/min, preferably 4000m/min, the cutting amount A13 is 0.05mm-0.15mm, preferably 0.1mm, and the cutting amount B13 is 0.05mm-0.1mm, preferably 0.05mm, the processing method is point hole processing, and the processing of the mounting hole on the first section is completed;

The specific parameters are shown in Table 1.

Table 1 Beginning Section 3 Parameter Table

Step 2 Process middle section 4:

For the rough machining shape, D6 end mill is used for rough machining of the product shape, and the spindle speed V11 is 3000m/min, the cutting amount A11 is 0.3mm, the cutting amount B11 is 0.1mm, and the processing method is contour bottom edge processing. There is a margin of 0.5mm after completion;

Finishing the shape, use D2 end mill to finish the product shape, and the spindle speed V12 is 4000m/min, the cutting amount A12 is 0.2mm, the cutting amount B12 is 0.05mm, the processing method is contour edge processing, side Edge processing product thickness and waist slot;

To process the ball hole, use the D6 ball milling cutter to process the spherical surface of the waist groove, and the spindle speed V13 is 4000m/min, the cutting amount A13 is 0.1mm, the cutting amount B13 is 0.05mm, the processing method is point hole processing, and the middle section 4 is completed. The processing of the installation hole;

The specific parameters are shown in Table 2.

Table 2 middle section 4 parameter table

Step 3 Processing tail section 5:

For the rough machining shape, D6 end mill is used for rough machining of the product shape, and the spindle speed V11 is 3000m/min, the cutting amount A11 is 0.3mm, the cutting amount B11 is 0.1mm, and the processing method is contour bottom edge processing. There is a margin of 0.5mm after completion;

Finishing the shape, use D2 end mill to finish the product shape, and the spindle speed V12 is 4000m/min, the cutting amount A12 is 0.2mm, the cutting amount B12 is 0.05mm, the processing method is contour edge processing, side Blade processing product thickness;

To process the ball hole, use D6 ball milling cutter with two ball holes, and the spindle speed V13 is 4000m/min, the cutting amount A13 is 0.1mm, the cutting amount B13 is 0.05mm, the processing method is point hole processing, and the tail section 5 is completed The processing of the installation hole;

The specific parameters are shown in Table 3.

Table 3 Tail section 5 parameter list

When the last section of ball hole processing is completed, the product is cut off with a D2 end mill;

The process of this turning center adopts a step-by-step processing method. Since the protruding part of the product is shorter during processing, the rigidity of the product is better guaranteed. Compared with the old process, the product quality is significantly improved, and there will be no surface chatter marks. The surface quality and The size is well controlled.

Wire cutting: As shown in Figure 5, since the product is processed segment by segment, only the shape of the tail segment 5 is cut directly without forming the final shape. Therefore, the cut product is clamped 1 Clamping, use wire cutting to cut off the part 2 that needs to be processed, and complete the processing of the shape of the tail;

Clean, clean the grease and dirt on the surface of the product. Basic process: ultrasonic cleaning→manual cleaning→2~3 times of water change and washing→circulation, adding ultrasonic cleaning, so that the fine grease of the product can be completely removed, and the product quality can be improved.

Embodiment two:

The difference between this embodiment and the first embodiment lies in that the selected parameters are different. As shown in Fig. 4 and Fig. 5, a kind of processing technology of cervical spine door-opening panel of the present invention, material preparation: the titanium rod of diameter φ16～φ20 is selected as blank, its length is between 2 meters and 3 meters, wherein the mass percentage of Ti ≥98.71%, the length of the titanium rod is far greater than the length of the door opening plate, because the protruding part of the titanium rod is shorter during product processing, the product processing rigidity is better guaranteed;

In the present embodiment, the blank is a polishing rod φ16×3000/100, that is, the diameter of the polishing rod is 16 mm, 3 meters long, and 100 pieces are produced in total;

Turning center: clamp the blank titanium rod with a jacket with a diameter of φ16.2, and fix it on the turning center, and then divide the blank into three sections according to the bending position of the door opening plate, which are the beginning section 3, the middle section 4 and the end section. Section 5 is divided into three steps and processed in the order of rough machining shape, finishing shape and machining ball hole;

Step 1 Processing start section 3:

Rough machining shape, use D6 end mill for rough machining of product shape, and spindle speed V11 is 3500m/min-4500m/min, preferably 4000m/min, cutting amount A11 is 0.3mm-0.4mm, preferably 0.35mm, The amount B11 is 0.1mm-0.15mm, preferably 0.1mm, and the processing method is equal-height bottom edge processing, leaving a margin of 0.5mm after processing;

Finishing the shape, use D2 end mill to finish the product shape, and the spindle speed V12 is 4000m/min-4500m/min, preferably 4500m/min, the cutting amount A12 is 0.2mm-0.3mm, preferably 0.25mm, The amount B12 is 0.05mm-0.08mm, preferably 0.05, and the processing method is contour edge processing to complete the processing of product thickness;

To process the ball hole, use D6 ball milling cutter to process the ball hole, and the spindle speed V13 is 4000m/min-4500m/min, preferably 4500m/min, the cutting amount A13 is 0.1mm-0.15mm, preferably 0.1mm, and the cutting amount B13 is 0.05mm-0.08mm, preferably 0.05mm, the processing method is point hole processing, and the processing of the mounting hole on the first section is completed;

The specific parameters are shown in Table 1.

Table 1 Beginning Section 3 Parameter Table

Step 2 Process middle section 4:

Rough machining shape, use D6 end mill for rough machining of product shape, and spindle speed V11 is 3000m/min-4000m/min, preferably 4000m/min, cutting amount A11 is 0.3mm-0.4mm, preferably 0.35mm, The amount B11 is 0.1mm-0.15mm, preferably 0.1mm, and the processing method is equal-height bottom edge processing, leaving a margin of 0.5mm after processing;

Finishing the shape, use D2 end mill to finish the product shape, and the spindle speed V12 is 4000m/min-4500m/min, preferably 4500m/min, the cutting amount A12 is 0.2mm-0.3mm, preferably 0.25mm, The amount B12 is 0.05mm-0.08mm, preferably 0.05mm, and the processing method is equal-height side edge processing, and the side edge processes product thickness and waist-shaped slot holes;

To process the ball hole, use D6 ball milling cutter to process the spherical surface of the waist groove, and the spindle speed V13 is 4000m/min-4500m/min, preferably 4500m/min, the cutting amount A13 is 0.1mm-0.15mm, preferably 0.1mm, the amount of cutting B13 is 0.05mm-0.08mm, preferably 0.05mm, and the processing method is point hole processing, and the processing of the mounting hole on the middle section 4 is completed;

The specific parameters are shown in Table 2.

Table 2 middle section 4 parameter table

Step 3 Processing tail section 5:

Rough machining shape, use D6 end mill for rough machining of product shape, and spindle speed V11 is 3000m/min-4000m/min, preferably 4000m/min, cutting amount A11 is 0.3mm-0.4mm, preferably 0.35mm, The amount B11 is 0.1mm-0.15mm, preferably 0.1mm, and the processing method is equal-height bottom edge processing, leaving a margin of 0.5mm after processing;

Finishing the shape, use D2 end mill to finish the product shape, and the spindle speed V12 is 4000m/min-4500m/min, preferably 4500m/min, the cutting amount A12 is 0.2mm-0.3mm, preferably 0.25mm, The amount B12 is 0.05mm-0.08mm, preferably 0.05, and the processing method is equal-height side edge processing, and the side edge processes the product thickness;

To process the ball hole, use D6 ball milling cutter to process the ball hole, and the spindle speed V13 is 4000m/min-4500m/min, preferably 4500m/min, the cutting amount A13 is 0.1mm-0.15mm, preferably 0.1mm, and the cutting amount B13 is 0.05mm-0.08mm, preferably 0.05mm, the processing method is point hole processing, and the processing of the mounting hole on the tail section 5 is completed;

The specific parameters are shown in Table 3.

Table 3 Tail section 5 parameter list

When the last section of ball hole processing is completed, the product is cut off with a D2 end mill.

Inspired by the ideal embodiment according to the present invention, through the above description, relevant workers can make various changes and modifications without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content in the description, and its technical scope must be determined according to the scope of the claims.

Claims (3)

1. A kind of 1. posterior cervical enabling board machining process, it is characterised in that：Comprise the following steps that：

   Stock：Blank chooses diameter phi 16~φ 20 stud, and its length is between 2 meters to 3 meters, wherein Ti mass percent >=98.71%；

   Turning center：Blank stud is clamped using the chuck that diameter matches with stud, and is fixed on turning center, then will Blank is divided into three sections, respectively beginning section, stage casing and endpiece according to the position for opening buckling door plank, paragraph by paragraph according to roughing profile, essence The order of processing profile and processing ball is processed.
2. 2. posterior cervical enabling board machining process as claimed in claim 1, it is characterised in that：

   Roughing profile, the roughing of product design is carried out using D6 slotting cutters, and the speed of mainshaft is V11, cutting data is A11, feed B11, processing mode are processed for contour shear blade, and 0.5mm surpluses are left after machining；

   Finished profile, product design is finished using D2 slotting cutters, and the speed of mainshaft is V12, cutting data is A12, feed B12, processing mode are contour flank milling, complete the processing of product thickness；

   Ball is processed, ball is processed using D6 ball endmills, and the speed of mainshaft is V13, cutting data A13, feed B13, Processing mode is point hole machined, completes the processing of each section of upper installing hole；

   And the speed of mainshaft meets V11 ＜ V12=V13, cutting data meets A11 ＜ A12 ＜ A13, and feed meets B11 ＞ B12 =B13；

   After the completion of final stage spherical -- hole processing, product is cut off using D2 slotting cutters；

   Wire cutting：Product after cutting off is clamped using clamping tooling (1), the processing of Tail Shape is completed using wire cutting；

   Cleaning, cleaning product surface grease and dirt.
3. 3. posterior cervical enabling board machining process as claimed in claim 1, it is characterised in that：The a diameter of φ 16 of stud When, a diameter of φ 16.2 of the chuck.