CN204221614U - Trailing type crankshaft grinding machine with double grinding carriages packaged type CBN dresser - Google Patents

Abstract

Follow-up type double grinding wheel frame crankshaft grinder movable CBN grinding wheel dresser, the diamond roller is installed at one end of the electric spindle; the electric spindle is installed in the hole of the box and fixed on the box by screws; the box is fixed on the top of the connecting body by screws , a slider is installed at the bottom of the connecting body, and the connecting body equipped with the slider can move along the linear guide rail, which is connected to the base with screws; the oil cylinder is fixed on the base through screws, and the connecting block connects the piston in the oil cylinder to the box; The rolling bearing is installed in the chute of the spring and the pressing handle; one end of the base is installed with a limit block along the moving direction of the linear guide rail. The device has the characteristics of compact structure, simple movement, good rigidity and stable correction. It can guarantee the processing accuracy of the crankshaft, improves the production efficiency of the follow-up double grinding wheel frame crankshaft grinder, and is suitable for high-precision, high-speed, high-acceleration-deceleration follow-up processing of automobile crankshafts.

Description

Follow-up double grinding wheel frame crankshaft grinder movable CBN grinding wheel dresser

technical field

The utility model relates to the technical field of numerical control grinding machines, in particular to a movable CBN grinding wheel dresser for a crankshaft grinding machine of a follow-up double grinding wheel frame. the

Background technique

The application of CBN grinding wheel on crankshaft grinding machine for large depth of cut and high efficiency grinding has become the development direction of today's crankshaft grinding machine. The crankshaft grinder is required to grind the outer circle and thrust surface of the crankshaft main journal and connecting rod journal, and the outer circle and end surface of the CBN grinding wheel are required to participate in grinding. There are three main problems in the CBN grinding wheel dresser of the existing crankshaft grinder: 1. The dresser of the crankshaft grinder is usually placed at the rear of the head and tail frame. External trimming edge. When using a grinding wheel with a larger diameter, in order to meet the dressing needs, the stroke of the grinding wheel carriage feeding mechanism (X-axis) must be increased, which will not only reduce the efficiency of the machine tool, but also affect the motion accuracy of the X-axis. If a larger grinding wheel is replaced later, the grinding wheel will interfere with the dresser; 2. At present, the crankshaft grinder uses two sets of diamond rollers when dressing the outer circle and end face of the CBN grinding wheel. 3. At present, the layout of the crankshaft grinder dresser is mostly in the form that the center line of the diamond roller is parallel to the center line of the grinding wheel or the angle between the two is an acute angle. The left and right end faces of the grinding wheel use diamond rollers The left and right dressing blades are trimmed separately. In order to ensure that the dresser has enough space to dress the left and right end faces of the grinding wheel, when the grinding wheel is wider, the length of the shaft end of the electric spindle must be increased, resulting in insufficient rigidity of the dresser. Therefore, when the electric spindle is running at high speed , the shaft end drives the roller to rotate, which will cause vibration, which will affect the dressing accuracy of the CBN grinding wheel. the

Contents of the invention

The purpose of this utility model is to provide a movable type CBN grinding wheel dresser for a follow-up double grinding wheel frame crankshaft grinder. The interference between the grinding wheel and the dresser optimizes the structure of the built-in motor, improves the rigidity of the dresser, and ensures the dressing accuracy. the

In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is a movable CBN grinding wheel dresser for a crankshaft grinder of a follow-up type double grinding wheel frame. The device includes a dressing mechanism, a hydraulic drive mechanism, a buffer fine-tuning mechanism, and a limit mechanism; The mechanism includes box body, connecting body, diamond roller, and electric spindle; the hydraulic drive mechanism includes slider, linear guide rail, oil cylinder, piston, and connecting block; the buffer fine-tuning mechanism includes spring, rolling bearing, and pressing handle; the limit mechanism includes base, limit Bit block; the headstock, CBN grinding wheel, workpiece bracket, tailstock, and crankshaft are the components of the crankshaft grinder, the front trimming edge and the side trimming edge are the trimming edges of the diamond roller, and the front trimming edge is installed on one end of the diamond roller for trimming On the outer circular surface of the CBN grinding wheel, the side dressing blades are installed on both sides of the diamond roller to dress the left and right end faces of the CBN grinding wheel. The diamond roller can realize the micro-precision dressing of the cutting edges on the three sides of the CBN grinding wheel. the

Specifically, the diamond roller is installed at one end of the electric spindle; the electric spindle is installed in the hole of the box and fixed on the box by screws; the box is fixed on the top of the connecting body by screws, and a slider is installed at the bottom of the connecting The connecting body of the block can move along the linear guide rail, and the linear guide rail is connected to the base with screws; the oil cylinder is fixed on the base through screws, and the connecting block connects the piston in the oil cylinder to the box; the rolling bearing is installed on the slide between the spring and the compression handle. In the groove, to facilitate the rotation adjustment of the pressing handle; one end of the base is installed with a limit block along the moving direction of the linear guide rail to ensure that the position of the dresser has no deviation during the process of dressing the CBN grinding wheel. the

The movable CBN grinding wheel dresser is installed on the working table of the follow-up double grinding wheel frame crankshaft grinder. In order to interfere with the crankshaft rotation space, the dresser is set at the contact with the limit block when dressing the grinding wheel. the

Compared with the prior art, the utility model has the following advantages. the

1. The dresser is placed on the work table and can move back and forth. Firstly, the problem of interference between the grinding wheel and the dresser is fundamentally solved; secondly, the feeding mechanism of the two grinding wheel frames is reduced during the dressing process of the grinding wheel. The stroke greatly reduces the production cost of linear motors, static pressure guide rails, and machine tool shields, and ensures the straightness and sensitivity of the wheelhead feed movement, thereby ensuring the shape of the CBN grinding wheel and the shape of the crankshaft. the

2. It adopts the structure of high-power electric spindle and diamond roller directly connected, which can achieve high rotation accuracy and improve the dressing accuracy of the grinding wheel. By replacing different electric spindles and diamond rollers, it can meet various dressing speed ratios. It is suitable for wide range. the

3. The structure of the diamond roller meets multiple functional requirements, and realizes the micro-precision dressing of cutting edges on up to three sides of the CBN grinding wheel with a set of dressers. the

4. The utility model has the characteristics of compact structure, simple movement, good rigidity and stable correction. It can guarantee the processing accuracy of the crankshaft, improves the production efficiency of the follow-up double grinding wheel frame crankshaft grinder, and is suitable for high-precision, high-speed, high-acceleration-deceleration follow-up processing of automobile crankshafts. the

Description of drawings

Fig. 1 Schematic diagram of the structure of the movable CBN wheel dresser for the crankshaft grinder of the follow-up double wheel frame. the

Fig. 2 is the left view of the movable CBN grinding wheel dresser of the crankshaft grinder of the follow-up double grinding wheel frame. the

Fig. 3 is a schematic diagram of the dresser when the crankshaft grinder dresses the grinding wheel. the

Fig. 4 is a schematic diagram of a dresser when a crankshaft grinder grinds workpieces. the

Figure 5.1 is a schematic diagram of the trimmer trimming the outer circle. the

Figure 5.2 is a schematic diagram of the left end face of the dresser for dressing. the

Figure 5.3 is a schematic diagram of the right end face of the dresser for dressing. the

In the figure: 1. Box body, 2. Connecting body, 3. Slider, 4. Linear guide rail, 5. Limiting block, 6. Base, 7. Diamond roller, 8. Electric spindle, 9. Oil cylinder, 10. Piston, 11, spring, 12, rolling bearing, 13, connecting block, 14, pressing handle, 15, head frame, 16, CBN grinding wheel, 17, workpiece bracket, 18, tail stock, 19, crankshaft, 20, front trimming edge, 21. Side trimming edge. the

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described. the

As shown in Figure 1-5.3, the movable CBN grinding wheel dresser for the crankshaft grinder of the follow-up double grinding wheel frame, the device includes a dressing mechanism, a hydraulic drive mechanism, a buffer fine-tuning mechanism, and a limit mechanism; among them, the dressing mechanism includes a box body 1 , connecting body 2, diamond roller 7, electric spindle 8; hydraulic drive mechanism includes slide block 3, linear guide rail 4, oil cylinder 9, piston 10, connecting block 13; buffer fine-tuning mechanism includes spring 11, rolling bearing 12, compression handle 14; The limit mechanism includes a base 6 and a limit block 5; wherein the headstock 15, the CBN grinding wheel 16, the workpiece bracket 17, the tailstock 18, and the crankshaft 19 are the components of the crankshaft grinder, and the front trimming edge 20 and the side trimming edge 21 are diamond rollers 7, the trimming edge 20 is installed on one end of the diamond roller 7 to trim the outer surface of the CBN grinding wheel 16, and the side trimming blade 21 is installed on both sides of the diamond roller 7 to trim the left and right ends of the CBN grinding wheel 16. The diamond roller 7 It can realize the micro-precision dressing of the three-side cutting edge of the CBN grinding wheel 16. the

Specifically, the diamond roller 7 is installed on one end of the electric spindle 8; the electric spindle 8 is installed in the hole of the box body and fixed on the box body 1 by screws; the box body 1 is fixed on the top of the connecting body 2 by screws, and the bottom of the connecting body 2 is installed There is a slider 3, and the connecting body 2 equipped with the slider 3 can move along the linear guide rail 4, and the linear guide rail 4 is connected with the base 6 by screws; the oil cylinder 9 is fixed on the base 6 by screws, and the connecting block 13 connects the piston in the oil cylinder 9 10 is connected with the box body 1; the rolling bearing 12 is installed in the chute of the spring 11 and the compression handle 14, so as to facilitate the rotation adjustment of the compression handle 14; one end of the base 6 is installed in a limited The bit block 5 ensures that the position of the dresser has no deviation during the process of dressing the CBN grinding wheel 16 . the

The movable CBN grinding wheel dresser is installed on the worktable of the follow-up type double grinding wheel frame crankshaft grinder. During the grinding process, the dresser is arranged at a non-contact position with the limit block 5 and there is a gap between the two, so that Interference with the turning space of the crankshaft 19 is avoided, and the dresser is arranged at the contact position with the limit block 5 when dressing the grinding wheel. the

The centerline of the diamond roller 7 is perpendicular to the centerline of the CBN grinding wheel 16 . the

The diamond roller 7 adopts a high-precision steel matrix, and the front trimming edge 20 and the rear trimming edge 21 are formed by sintering diamond particles. the

The buffer fine-tuning mechanism is that when the thrust of the hydraulic oil in the oil cylinder 9 is constant, the size of the thrust of the spring 11 can be adjusted by rotating the compression handle 14, so as to ensure that the position of the dresser is constant during the process of dressing the grinding wheel; It plays a buffer role in the middle, and acts as a fixed support force after pressing to ensure that the trimming position remains unchanged. the

The hydraulic cylinder 9 is the driving mechanism of the device, which can drive the dresser to reciprocate along the linear guide rail 4, so as to realize the switching between the grinding workpiece of the machine tool and the dressing action of the grinding wheel. the

The working principle of the movable CBN grinding wheel dresser of the follow-up double grinding wheel frame crankshaft grinder is divided into the CBN grinding wheel dressing process and the grinding process; the CBN grinding wheel dressing process, when the dresser is working, the hydraulic oil pushes the piston 10 along the limit The block 5 moves, the piston 10 drives the connecting block 13 and the pressing handle 14 to move along the chute, the pressing handle 14 is connected with the spring 11 by means of the rolling bearing 12, and pushes the connecting body 2 to move along the linear guide rail 4, when the connecting body 2 touches the limit At block 5, the hydraulic oil continues to push the piston 10 to move. The thrust is applied to the spring 11 through the compression handle 14. The spring 11 can absorb part of the thrust and play a certain buffering role. At the same time, the thrust is transmitted to the connecting body 2. Under the combined action of the limit block 5 and the thrust of the hydraulic cylinder, the dresser keeps the position without deviation. At this time, the diamond roller 7 uses its front trimming edge 20 to trim the cutting edge of the outer circular end face of the CBN grinding wheel 16, and uses its side trimming edge 21 to trim The cutting edges on both sides of the CBN grinding wheel 16; during the grinding process, when the grinding wheel grinds the crankshaft, the hydraulic oil pushes the piston 10 away from the limit block 5, drives the entire dresser to move in the opposite direction, and clamps the crankshaft 19 on the head frame 15, Between the tailstock 16, the headstock 15 and the tailstock 16 drive the crankshaft 19 to rotate, and the CBN grinding wheel 16 advances to grind the main journal and connecting pin journal of the crankshaft 19. The non-contact position of the limit block 5 and a gap between the two ensure that the trimmer does not interfere with the turning space of the crankshaft 19 . the

Example

In this embodiment, both the CBN grinding wheel 16 and the diamond roller 7 perform rotary motion, resulting in a relative speed difference. The speed ratio can be set from -1 to +1, and can be trimmed from both sides (left or right) of the diamond roller 7 to perform two speed ratio trimmings of -1 to 0 or 0 to +1 respectively, so It is not necessary to adjust the forward and reverse rotation of the electric spindle 8, which reduces the cost. At the same time, the CBN grinding wheel 16 and the diamond roller 7 are fed along the linear coordinate axis, and the speed is set from 0.5mm/min to 10m/min. Through the matching of various parameters, the purpose of surface modification of the CBN grinding wheel 16 is realized. the

The examples described above are only to describe the preferred implementation of the present utility model, not to limit the scope of the present utility model. All variations and improvements should fall within the protection scope determined by the claims of the present utility model. the

Claims (2)

1. A movable CBN grinding wheel dresser for a crankshaft grinder with a follow-up double grinding wheel frame, which is characterized in that the device includes a dressing mechanism, a hydraulic drive mechanism, a buffer fine-tuning mechanism, and a limit mechanism; wherein, the dressing mechanism includes a box (1) , connecting body (2), diamond roller (7), electric spindle (8); the hydraulic drive mechanism includes slider (3), linear guide rail (4), oil cylinder (9), piston (10), connecting block (13) ; The buffer fine-tuning mechanism includes a spring (11), a rolling bearing (12), and a pressing handle (14); the limit mechanism includes a base (6), a limit block (5); wherein the head frame (15), the CBN grinding wheel (16) , the workpiece bracket (17), the tailstock (18), and the crankshaft (19) are the components of the crankshaft grinder, and the front trimming edge (20), the side trimming edge (21) are the trimming edges of the diamond roller (7), and the front trimming edge (20) is installed on one end of the diamond roller (7) to trim the outer surface of the CBN grinding wheel (16), and the side trimming blade (21) is installed on both sides of the diamond roller (7) to trim the left and right sides of the CBN grinding wheel (16) On the end face, the diamond roller (7) can realize the micro-precision dressing of the three-sided cutting edge of the CBN grinding wheel (16); Specifically, the diamond roller (7) is installed at one end of the electric spindle (8); the electric spindle (8) is installed in the hole of the box body and fixed on the box body (1) by screws; the box body (1) is fixed on the box body (1) by screws. The top of the connecting body (2) and the bottom of the connecting body (2) are equipped with a slider (3), and the connecting body (2) with the slider (3) can move along the linear guide rail (4), and the linear guide rail (4) is screwed It is connected with the base (6); the oil cylinder (9) is fixed on the base (6) by screws, and the connecting block (13) connects the piston (10) in the oil cylinder (9) with the box body (1); the rolling bearing (12 ) is installed in the chute of the spring (11) and the compression handle (14); one end of the base (6) is installed with a limit block (5) along the moving direction of the linear guide rail (4); The movable CBN grinding wheel dresser is installed on the working table of the follow-up double wheel frame crankshaft grinder. During the grinding process, the dresser is set at the non-contact position with the limit block (5) and there is a gap between the two , and the dresser is set at the contact with the limit block (5) when dressing the grinding wheel. 2. The movable CBN grinding wheel dresser for crankshaft grinder with follow-up double grinding wheel carriages according to claim 1, characterized in that: the center line of the diamond roller (7) is perpendicular to the center line of the CBN grinding wheel (16).