CN106346024A - Common lathe deep hole machining method - Google Patents

Abstract

The invention relates to the field of machining, in particular to a common lathe deep hole machining method. The common lathe deep hole machining method comprises the following steps that 1 mm is reserved for the total length of two turned-leveled end faces, chambering of is conducted at two ends of a hole 2 * 30 degrees, rough turning is conducted on an external circle by using two top clamps, and the unilateral allowance of 0.5 mm is reserved; one end is clamped, the other end is supported by using a central rack, rough turning is conducted on an inner hole by using a common inner hole cutter for one half 225 mm of the total length, and the unilateral allowance of 0.5 mm is reserved; rough turning is conducted on the residual hole of the other end, and the unilateral allowance of 0.5 mm is reserved for the inner hole; finish turning is conducted on two end faces, the total length of the workpiece is controlled, and chambering is conducted on the holes formed in the two ends for 2 * 30 degrees. The surface roughness and precision of the holes machined by adopting the method meet the drawing requirements, other technical indexes also meet the drawing requirements, deep holes having large length-diameter ratio can be smoothly machined only by using a common lathe and manufacturing several simple tools and clamps according to the technical requirements of drawings without clamps special for deep hole machining, and the method has higher economic benefit especially for small-batch products.

Description

Engine lathe deep hole processing method

Technical field

The present invention relates to field of machining is and in particular to engine lathe deep hole processing method.

Background technology

Acquired a certain degree of difficulty using engine lathe processing deep-hole parts tool, when especially draw ratio is more than more than 10, technology is difficult Degree is bigger.Processing single-piece or the deep hole workpiece of small lot, generally adopt the standard spiral bit of spreading, carry out on engine lathe Drilling.But when through drilling deep hole will further polish, make that deep hole reaches higher dimensional accuracy and less surface is thick During rugosity value, it is necessary for taking other technological measures, to solve each side technical problem of deep hole machining.Deep hole machining turning When endoporus knife bar thin and grow, poor rigidity, low intensity, easily produce vibration and allow knife phenomenon, and easily produce taper and miss Difference, badly influences workpiece machined surface roughness and precision.Due to hole depth, coolant is not easily accessible, and chip removal is difficult, such as ferrum Bits discharge has some setbacks, and iron filings will scratch finished surface, has a strong impact on surface roughness, cutter meeting unstable wear, reduction makes Use the life-span.The import and export of deep hole often occurs ripple, horn mouth, and turning rectilinearity is poor, so that machining accuracy is reduced.

Content of the invention

In order to solve the above problems, the present invention provides the surface roughness in hole after a kind of processing, precision reaches drawing will Ask, other technical specifications also reach drawing requirement, and only need engine lathe and manufacture some simple clamping apparatus just can be smooth The drawing technical requirements processing big deep hole of draw ratio press and the special fixture without deep hole machining in ground, especially for small quantities of volume production The engine lathe deep hole processing method of higher economic benefit is more embodied during product.

Engine lathe deep hole processing method of the present invention, comprises the following steps:

The first step, car flat both ends of the surface overall length stays 1 mm, and in 2 × 30 ° of hole two chamfer, with two top clampings rough turn cylindrical stay remaining Measure monolateral 0.5 mm；

Second step, clamps one end, and other end centre frame is held, using conventional Boring cutter rough turn endoporus total length half 225 Mm, monolateral 0.5 mm of made allowance；

3rd step, turns around, and rough turn other end remainder hole is long, the monolateral surplus staying 0.5 mm of endoporus；

4th step, smart car both ends of the surface simultaneously control workpiece total length, 2 × 30 ° of two ends orifice chamfer；

5th step, with two thimble clamping smart car cylinder bodies cylindrical to dimensional requirement；

6th step, clamps cylindrical, centering with four paws, and holding smart car endoporus roughness with centre frame is ra3.2, made allowance 0.2 mm；

7th step, turns around to repeat the endoporus of the 3rd step second half length of smart car, and roughness is ra3.2, made allowance 0.2 mm；

8th step, floating boring: clamp mold with four paws and corrected with dial gauge；The center of correction knife bar is coaxial with main shaft Degree, puts mold body opening into fairlead, workpiece is contained in collet, then collet is inserted in together with workpiece tire In tool taper hole, locking nut of screwing on locks workpiece, and is held with centre frame, and boring cutter bar is inserted in workpiece hole, and alignment guide Set endoporus, the pad of 1 piece of 5mm on pad in fairlead front end face, screwed in knife bar female thread with the bolt of m8, be directed to cover Locate with knife bar, load onto right boring cutter head, divide and carry out boring, first time cutting data v for 2 times_f=5m/min, f=0.1 mm/r, a_p= 0.05 mm；Drive and open water pump and start first time boring, second cutting speed v_f=5m/min, f=0.05mm/r, a_p= 0.055mm.

The surface roughness in hole after present invention processing, precision reach drawing requirement, and other technical specifications also reach drawing Require, and only need engine lathe and manufacture some simple clamping apparatus just can successfully by drawing technical requirements processing draw ratio Big deep hole and the special fixture without deep hole machining, especially for more embodying higher economic effect during be pilot Benefit.

Specific embodiment

Engine lathe deep hole processing method of the present invention is it is characterised in that comprise the following steps:

The first step, car flat both ends of the surface overall length stays 1 mm, and in 2 × 30 ° of hole two chamfer, with two top clampings rough turn cylindrical stay remaining Measure monolateral 0.5 mm；

Second step, clamps one end, and other end centre frame is held, using conventional Boring cutter rough turn endoporus total length half 225 Mm, monolateral 0.5 mm of made allowance；

3rd step, turns around, and rough turn other end remainder hole is long, the monolateral surplus staying 0.5 mm of endoporus；

4th step, smart car both ends of the surface simultaneously control workpiece total length, 2 × 30 ° of two ends orifice chamfer；

5th step, with two thimble clamping smart car cylinder bodies cylindrical to dimensional requirement；

6th step, clamps cylindrical, centering with four paws, and holding smart car endoporus roughness with centre frame is ra3.2, made allowance 0.2 mm；

7th step, turns around to repeat the endoporus of the 3rd step second half length of smart car, and roughness is ra3.2, made allowance 0.2 mm；

8th step, floating boring: clamp mold with four paws and corrected with dial gauge；The center of correction knife bar is coaxial with main shaft Degree, puts mold body opening into fairlead, workpiece is contained in collet, then collet is inserted in together with workpiece tire In tool taper hole, locking nut of screwing on locks workpiece, and is held with centre frame, and boring cutter bar is inserted in workpiece hole, and alignment guide Set endoporus, the pad of 1 piece of 5mm on pad in fairlead front end face, screwed in knife bar female thread with the bolt of m8, be directed to cover Locate with knife bar, load onto right boring cutter head, divide and carry out boring, first time cutting data v for 2 times_f=5m/min, f=0.1 mm/r, a_p= 0.05 mm；Drive and open water pump and start first time boring, second cutting speed v_f=5m/min, f=0.05mm/r, a_p= 0.055mm.

The surface roughness in hole after present invention processing, precision reach drawing requirement, and other technical specifications also reach drawing Require, and only need engine lathe and manufacture some simple clamping apparatus just can successfully by drawing technical requirements processing draw ratio Big deep hole and the special fixture without deep hole machining, especially for more embodying higher economic effect during be pilot Benefit.

Claims (1)

1. a kind of engine lathe deep hole processing method is it is characterised in that comprise the following steps:

The first step, car flat both ends of the surface overall length stays 1 mm, and in 2 × 30 ° of hole two chamfer, with two top clampings rough turn cylindrical stay remaining Measure monolateral 0.5 mm；

Second step, clamps one end, and other end centre frame is held, using conventional Boring cutter rough turn endoporus total length half 225 Mm, monolateral 0.5 mm of made allowance；

3rd step, turns around, and rough turn other end remainder hole is long, the monolateral surplus staying 0.5 mm of endoporus；

4th step, smart car both ends of the surface simultaneously control workpiece total length, 2 × 30 ° of two ends orifice chamfer；

5th step, with two thimble clamping smart car cylinder bodies cylindrical to dimensional requirement；

6th step, clamps cylindrical, centering with four paws, and holding smart car endoporus roughness with centre frame is ra3.2, made allowance 0.2 mm；

7th step, turns around to repeat the endoporus of the 3rd step second half length of smart car, and roughness is ra3.2, made allowance 0.2 mm；

8th step, floating boring: clamp mold with four paws and corrected with dial gauge；The center of correction knife bar is coaxial with main shaft Degree, puts mold body opening into fairlead, workpiece is contained in collet, then collet is inserted in together with workpiece tire In tool taper hole, locking nut of screwing on locks workpiece, and is held with centre frame, and boring cutter bar is inserted in workpiece hole, and alignment guide Set endoporus, the pad of 1 piece of 5mm on pad in fairlead front end face, screwed in knife bar female thread with the bolt of m8, be directed to cover Locate with knife bar, load onto right boring cutter head, divide and carry out boring, first time cutting data v for 2 times_f=5m/min, f=0.1 mm/r, a_p= 0.05 mm；Drive and open water pump and start first time boring, second cutting speed v_f=5m/min, f=0.05mm/r, a_p= 0.055mm.