CN204584922U - A kind of lathe grinding processing unit (plant) of carbide alloy body cylindrical circular arc king bolt groove - Google Patents

Abstract

The utility model discloses a kind of lathe grinding processing unit (plant) of carbide alloy body cylindrical circular arc king bolt groove, comprise motor, bistrique, longitudinal feed mechanism, transverse feed mechanism and motor mount; Longitudinal feed mechanism comprises the longitudinal slide be arranged on vehicle body slide rail, and longitudinal slide internal fixtion is provided through feed screw nut's part of turning machine screw; Transverse feed mechanism comprises the cross slide be slidably mounted on longitudinal slide, is provided with the feed screw nut's assembly driving cross slide to slide between cross slide and longitudinal slide; Motor mount is provided with and compresses mount pad latch segment, mount pad latch segment is threaded with cross slide through motor mount; Motor is fixedly mounted on motor mount, and bistrique is fixed on the output shaft of motor.Lathe grinding processing unit (plant) of the present utility model is applicable to engine lathe and numerically controlled lathe, for the external spiral groove of processing rigid alloy product, is easy to processing.

Description

A lathe grinding device for large circular arc-shaped large spiral grooves on the outside of a hard alloy pipe

technical field

The utility model belongs to the technical field of hard alloy manufacturing, in particular to a lathe grinding device for a large circular arc-shaped spiral groove on the outer body of a hard alloy pipe.

Background technique

The forming of the outer circular spiral groove of the cemented carbide compact can be realized by special molding or processing of the cemented carbide compact, but the final product will produce large non-uniform shrinkage after the compact is sintered, so it is difficult to guarantee the hardness after shrinkage. The size and shape accuracy of the outer circular spiral groove of the alloy sintered product, so the outer circular spiral groove of the cemented carbide sintered product can only be completed by subsequent processing. Due to the extremely high hardness of cemented carbide sintered products, the traditional turning method cannot be used to process the outer circular spiral groove of cemented carbide sintered products, and the outer circular spiral groove of cemented carbide sintered products can only be processed by grinding and EDM , EDM processing costs are high and processing efficiency is low, so only grinding is the preferred post-processing method.

The traditional grinding method can be used to grind the ring groove on the outer circle of the cemented carbide. Since the grinding wheel grinding contour line will interfere with the inclined line of the spiral groove, it is impossible to effectively control the grinding groove width. Therefore, the traditional grinding method It cannot be used to grind external spiral grooves. There is a certain market demand for cemented carbide products with circular arc-shaped spiral grooves in the outer circle, which naturally puts forward requirements for the processing technology of the circular arc-shaped spiral grooves in cemented carbide sintered products.

Utility model content

The purpose of the utility model is to provide a lathe grinding device for large circular arc-shaped large spiral grooves on the outside of hard alloy pipes in view of the problem that it is difficult to process large spiral grooves on the outside of hard alloy pipes in the prior art. Installed on the lathe, the axis of rotation of the grinding head and the axis of rotation of the hard alloy tube form an inclined angle, which realizes the precise grinding and processing of the outer circle and arc of the carbide tube by the operation of the lathe mechanism shaped spiral groove.

In order to achieve the above object, the technical solution adopted by the utility model is:

A lathe grinding device for large circular arc-shaped large spiral grooves on the outside of a hard alloy pipe, including a motor, a grinding head, a longitudinal feed mechanism, a transverse feed mechanism and a motor mounting seat; the longitudinal feed mechanism includes The longitudinal sliding seat on the rail, the screw nut part passing through the lathe screw rod is fixed inside the longitudinal sliding seat; the transverse feed mechanism includes a horizontal sliding seat slidingly installed on the longitudinal sliding seat, and the gap between the horizontal sliding seat and the longitudinal sliding seat A screw nut assembly that drives the sliding of the horizontal sliding seat is installed between them; a locking block of the pressing mounting seat is arranged on the motor mounting seat, and the locking block of the mounting seat passes through the motor mounting seat and is threadedly connected with the horizontal sliding seat; the motor is fixedly installed on the motor On the mounting seat, the grinding head is fixed on the output shaft of the motor; the grinding head adopts an arc-shaped grinding head whose outer circumference grinding part is arc-shaped.

Preferably, the screw nut assembly includes a horizontal driving screw and a horizontal screw nut screwed together, the horizontal driving screw is arranged in the longitudinal sliding seat, and a horizontal adjustment handle is fixedly arranged at the end of the horizontal driving screw , the horizontal screw nut is fixed in the horizontal sliding seat.

Preferably, the thickness of the grinding head is the same as the width of the arc-shaped spiral groove to be processed.

Preferably, the grinding head adopts an arc-shaped grinding head whose outer cylindrical grinding part is arc-shaped.

Owing to adopting above-mentioned technical scheme, the beneficial effect of the utility model is:

1. The lathe grinding device of the present utility model can be used on numerically controlled lathes and ordinary lathes.

2. The lathe grinding device of the present invention can not only be used to process circular arc-shaped spiral grooves in the outer circle of sintered carbide products, but also can be used to process spiral grooves in other shapes in the outer circle of sintered carbide products.

Description of drawings

Fig. 1 is a schematic diagram of the installation state of the lathe grinding device of the present invention.

Fig. 2 is a schematic diagram of the product structure of the cemented carbide bushing of the utility model.

Fig. 3 is a side view of the lathe grinding device of the present invention.

Fig. 4 is a cross-sectional view along line A-A of Fig. 3 .

Fig. 5 is a B-B sectional view of Fig. 3 .

Fig. 6 is a C-C sectional view of Fig. 3 .

Fig. 7 is a top view of the processing state of the lathe grinding device of the present invention.

Marks in the figure: 10-grinding head, 20-motor, 30-motor mounting seat, 40-mounting seat locking block, 50-transverse feed mechanism, 51-transverse sliding seat, 52-transverse screw nut, 53-transverse Drive screw, 54-horizontal adjustment handle, 60-longitudinal feed mechanism, 61-longitudinal slide, 62-screw nut, 71-screw screw for lathe, 72-body slide rail, 80-mandrel, 90-hard Quality alloy shaft sleeve products.

Detailed ways

The rotation axis of the conventional grinding head is parallel to the rotation axis of the processed product, and the grinding head is perpendicular to the rotation axis of the processed product. Spiral groove products have a larger angle of spiral expansion line, and in order to ensure the grinding line speed, the grinding head has a larger diameter, and the spiral groove is ground by the conventional grinding process due to the dryness of the grinding head contour. It is wider than the width of the grinding head, and its width will be determined by the product diameter, product spiral groove depth, spiral expansion line angle and grinding wheel diameter, which brings great difficulties to processing and control.

Referring to Figures 1-7, the included angle α2 between the rotation axis of the grinding head 10 of the present invention and the rotation axis of the lathe spindle is the vertical line between the helical expansion line of the cemented carbide product and the rotation axis of the lathe spindle. The included angle α1, α1 is equal to α2, so that the grinding head 10 can maintain the original shape of the embedded spiral groove for grinding, completely avoiding the aforementioned interference. The feeding is completed by the longitudinal feed mechanism 60 and the transverse feed mechanism 50. The grinding gap on the horizontal plane of the lathe spindle rotation axis is elliptical, the spiral groove arc at the angle of the inclined helical expansion line is circular, and the transverse feed The vertical feed value of the mechanism 50 is equivalent to the feed of the arc depth of the helical groove.

The utility model relates to a lathe grinding device for a circular spiral groove of a cemented carbide tube, comprising a motor 20 , a grinding head 10 , a longitudinal feed mechanism 60 , a transverse feed mechanism 50 and a motor mount 30 . The longitudinal feed mechanism 60 includes a longitudinal sliding seat 61 installed on the slide rail 72 of the vehicle body, and a screw nut part 62 passing through the screw rod 71 of the lathe is fixedly arranged in the longitudinal sliding seat 61 . The transverse feed mechanism 50 includes a transverse slide 51 slidably mounted on the longitudinal slide 61 , and screw nut assemblies 52 , 53 for driving the transverse slide 51 to slide are installed between the transverse slide 51 and the longitudinal slide 61 . The motor mounting base 30 is provided with a pressing mounting base locking block 40 , and the mounting base locking block 40 passes through the motor mounting base 30 and is threadedly connected with the transverse sliding base 51 . The motor 20 is fixedly installed on the motor mounting base 30, the grinding head 10 is fixed on the output shaft of the motor 20, and when the locking block 40 of the mounting base is loosened, the installation angle of the motor 20 on the horizontal plane can be adjusted. After adjustment, Then the motor mounting base 30 is locked by the mounting base locking block 40 . The grinding head 10 adopts the arc-shaped grinding head 10 whose outer circumference grinding part is arc-shaped, and the thickness of the grinding head 10 is the same as the width of the arc-shaped spiral groove to be processed.

The screw nut assembly 52, 53 includes a transverse drive screw 53 and a transverse screw nut 52 screwed together. The transverse drive screw 53 is arranged in the longitudinal sliding seat 61, and a transverse drive screw 53 is fixedly arranged at the end of the transverse drive screw. The adjusting handle 54 and the transverse screw nut 52 are fixed in the transverse sliding seat 51 .

The longitudinal movement of the grinding head 10 and the motor 20 is adjusted by the longitudinal feed mechanism 60. Turn the lathe screw 71, and the longitudinal slide 61 will move longitudinally under the action of the lathe screw 71 and the screw nut 62. , thereby driving the transverse feed mechanism 50 on the longitudinal slide 61, the motor 20 and the grinding head 10 to move longitudinally. The longitudinal movement of the grinding head 10 and the motor 20 is adjusted by the transverse feed mechanism 50. Turn the transverse adjustment handle 54 to rotate the transverse transmission screw 53. Under the action of the transverse transmission screw 53 and the transverse screw nut 52 , drive the horizontal sliding seat 51 to move, thereby driving the motor mounting seat 30, the motor 20 and the grinding head 10 on the horizontal sliding seat 51 to move laterally. The installation angle of the motor 20 and the grinding head 10 on the horizontal plane is completed by the locking block 40 of the mounting seat. When the locking block 40 of the mounting seat is loosened, the installation angle of the motor 20 on the horizontal plane can be adjusted. , and then lock the motor mounting base 30 through the mounting base locking block 40 .

The processing method of the lathe grinding device of the utility model is further described below by specific examples:

Example 1:

Carbide grade YG6, hard alloy shaft sleeve product 90 with an outer diameter D of 25.4mm and a length of 38.1mm, the pitch S of the outer circular spiral groove is 25.4mm, and the arc r is 3mm.

Use a mandrel 80 to thread and fasten the cemented carbide sintered product that has been ground to the size of the outer circle and the arc-shaped spiral groove of the outer circle to be processed. One end of the mandrel 80 is clamped with a lathe spindle chuck, and the other end of the mandrel 80 is Use the lathe tailstock to withstand, through the lathe grinding device of the present invention, the rotation axis of the grinding head 10 and the rotation axis of the lathe main shaft are fixed on the same horizontal plane, and D and S are brought into the formula tgα1=S/ πD, tgα1=25.4/π25.4, get the angle α1 between the helical expansion line of the cemented carbide product and the vertical line of the lathe spindle rotation axis, α1=17°40′, and then rotate the grinding head 10 The axis line is adjusted so that the included angle α2 between the axis line of the lathe spindle and the rotation axis line is 17°40′, and the grinding part of the grinding head 10 is repaired into an arc of r=3mm, and the grinding head 10 with the repaired arc is Install the output shaft of the motor 20, set the pitch of the lathe to 25.4mm, start the lathe and the grinding head 10, complete the tool setting with the longitudinal feed mechanism 60 and the transverse feed mechanism 50 of the lathe grinding device, and use the transverse feed The mechanism 50 is used to complete the groove depth feed equal to the depth of the spiral groove, and the cutting amount is 0.03 mm to complete the processing with each feed amount.

Example 2:

Carbide grade YG6, hard alloy shaft sleeve product 90 with an outer diameter D of 24mm and a length of 30mm, the pitch S of the outer circular spiral groove is 20mm, and the arc r is 3mm.

Use a mandrel 80 to thread and fasten the cemented carbide sintered product that has been ground to the size of the outer circle and the arc-shaped spiral groove of the outer circle to be processed. One end of the mandrel 80 is clamped with a lathe spindle chuck, and the other end of the mandrel 80 is Use the lathe tailstock to withstand, through the lathe grinding device of the present invention, the rotation axis of the grinding head 10 and the rotation axis of the lathe main shaft are fixed on the same horizontal plane, and D and S are brought into the formula tgα1=S/ πD, tgα1=20/π24, the angle α1 between the helical expansion line of the cemented carbide product and the vertical line of the lathe spindle rotation axis line is obtained, α1=14°51′, and then the rotation axis of the grinding head 10 Adjust the line so that the included angle α2 between it and the rotation axis of the lathe spindle is 14°51′, repair the grinding part of the grinding head 10 into an arc of r=3mm, and install the motor on the grinding head 10 after repairing the arc On the output shaft of 20, set the pitch of the lathe to 20 mm, start the lathe and the grinding head 10, use the longitudinal feed mechanism 60 and the transverse feed mechanism 50 of the lathe grinding device to complete the tool setting, and use the transverse feed mechanism 50 to complete the groove depth equivalent to the depth of the spiral groove, and complete the processing with a cutting amount of 0.03 mm per time.

Example 3:

Carbide grade YG6, hard alloy bushing product 90 with an outer diameter D of 35mm and a length of 50mm, the pitch S of the outer circular spiral groove is 25mm, and the arc r is 5mm.

Use mandrel 80 to thread and fasten the cemented carbide sintered product that has been ground to the size of the outer circle and the arc-shaped spiral groove of the outer circle to be processed. One end of the mandrel 80 is clamped with a lathe spindle chuck, and the other end Use the lathe tailstock to withstand, through the lathe grinding device of the present invention, the rotation axis of the grinding head 10 and the rotation axis of the lathe main shaft are fixed on the same horizontal plane, and D and S are brought into the formula tgα1=S/ πD, tgα1=25/π35, the angle α1 between the helical expansion line of the cemented carbide product and the vertical line of the lathe spindle rotation axis line is obtained, α1=12°49′, and then the rotation axis of the grinding head 10 Adjust the line so that the included angle α2 between it and the rotation axis of the lathe spindle is 12°49′, repair the grinding part of the grinding head 10 into an arc of r=5mm, and install the motor on the grinding head 10 after the repaired arc On the output shaft of 20, set the pitch of the lathe to 25 mm, start the lathe and the grinding head 10, use the longitudinal feed mechanism 60 and the transverse feed mechanism 50 of the lathe grinding device to complete the tool setting, and use the transverse feed mechanism 50 to complete the groove depth equivalent to the depth of the spiral groove, and complete the processing with a cutting amount of 0.03 mm per time.

Claims (4)

1. A lathe grinding device for a large spiral groove of a circular arc shape on the outside of a cemented carbide tube, it is characterized in that it comprises a motor (20), a grinding head (10), a longitudinal feed mechanism (60), a transverse feed Mechanism (50) and motor mount (30); Longitudinal feed mechanism (60) comprises the longitudinal sliding seat (61) that is installed on the vehicle body slide rail (72), and longitudinal sliding seat (61) is fixedly provided with through lathe The screw nut part (62) of the screw mandrel (71); the transverse feed mechanism (50) includes a transverse slide seat (51) slidingly installed on the longitudinal slide seat (61), and the transverse slide seat (51) and the longitudinal slide seat (61) is installed between the screw nut assembly (52,53) that drives the horizontal sliding seat (51) to slide; the motor mounting seat (30) is provided with a compression mounting seat locking block (40), and the mounting seat is locked The block (40) passes through the motor mounting seat (30) and is threadedly connected with the transverse slide seat (51); the motor (20) is fixedly installed on the motor mounting seat (30), and the grinding head (10) is fixed on the output of the motor (20) On the shaft; the grinding head (10) adopts the grinding head (10) having the same shape as the outer circumference grinding part and the spiral groove to be processed. 2. The lathe grinding device according to claim 1, characterized in that, the screw nut assembly (52, 53) comprises a transverse drive screw (53) and a transverse screw nut (52) screwed together ), the horizontal transmission screw rod (53) is arranged in the longitudinal slide seat (61), and the horizontal adjustment handle (54) is fixedly arranged at the end of the horizontal transmission screw rod (53), and the horizontal screw rod nut (52) is fixed on the horizontal Inside the sliding seat (51). 3. The lathe grinding device according to claim 1, characterized in that, the thickness of the grinding head (10) is the same as the width of the arc-shaped spiral groove to be processed. 4 . The lathe grinding device according to claim 1 , characterized in that, the grinding head ( 10 ) is an arc-shaped grinding head with an outer circular grinding part.