CN106903579A - A kind of not rounded curved surface part self adaptation sander - Google Patents

Abstract

The invention discloses an adaptive grinding machine for non-circular surface parts, which mainly includes a stepping motor, a lead screw, a rectangular sliding table, a workpiece driving part, a main shaft, a vertical bearing seat, a strain gauge, a control system single-chip microcomputer, a desktop grinding machine, etc. The strain gauge is fixed on the side wall of the vertical bearing seat, and the workpiece rotates with the main shaft under the drive of the DC motor. The grinding force of the grinding wheel on the workpiece is transmitted to the vertical bearing seat to generate strain, and the strain signal is transmitted to the control system microcontroller. , by detecting that the strain exceeds the preset range, the steering and feed of the stepping motor are adjusted, and the grinding force is kept constant through the force feedback. The invention can effectively improve the surface grinding quality of non-circular surface parts and improve the harm of grinding noise and dust to the health of workers during the manual grinding process. It has the advantages of simple structure, convenient operation, easy workpiece clamping, low cost, and high degree of product serialization. Features, suitable for grinding small non-circular surface parts.

Description

An Adaptive Grinding Machine for Noncircular Surface Parts

technical field

The invention relates to a grinding machine, in particular to an adaptive grinding machine for non-circular curved surface parts

Background technique

The processing and polishing of non-circular surface parts need to be completed by corresponding numerical control equipment. Due to the inconsistency of the curvature of each point on the contour of non-circular surface parts, the grinding process is complicated, and it is difficult to guarantee the machining accuracy with traditional CNC machine tools. At present, most of the polishing equipment adopts the abrasive belt grinding technology, but the abrasive belt grinding technology is usually suitable for workpieces with large size and complex structure. It is more economical to use the manipulator clamping method for grinding, and it depends on the operation of workers. The degree of proficiency subjectively feels the size of the grinding force to control the grinding allowance. This kind of grinding efficiency is low and the processing accuracy is not high. Therefore, a force-adaptive grinding machine is developed. It can also improve processing efficiency and improve the working environment of workers. It is an efficient and environmentally friendly machining equipment with broad application prospects.

Contents of the invention

The present invention aims to provide a device capable of detecting the grinding force between the grinding wheel and the workpiece and keeping the grinding force constant for small non-circular curved parts, such as cam parts, that is, a self-adaptive grinding machine with force .

The object of the present invention is achieved through the following technical solutions: an adaptive grinding machine for non-circular curved surface parts, including a base and a desktop grinding machine, the desktop grinding machine is fixed on the base through the grinding machine support, and it is characterized in that the base is also A grinder adaptive mechanism is provided, and the grinder adaptive mechanism includes a stepping motor, the shaft of the stepping motor is connected to the lead screw through a coupling A, and the lead screw is guided by a lead screw-guiding screw arranged at its two ends and having the same structure. The bearing support in the rod support seat A and the lead screw-guide rod support seat B, the lead screw-guide rod support seat A and the lead screw-guide rod support seat B are fixed on the base, and a rectangular sliding table is arranged on the lead screw, There are three through holes on the rectangular sliding table, the middle hole is a threaded hole, and the movement of the rectangular slider can be realized by cooperating with the lead screw. There are symmetrically distributed light holes on both sides. Two guide rods pass through it to support and guide. The two guide rods The end is fixed on the lead screw-guide rod support seat A and the lead screw-guide rod support seat B through the top screw, the rectangular slider is connected with the workpiece driving part, and the workpiece drive part includes a DC motor, and the DC motor shaft passes through the coupling Device B is connected to the main shaft, the workpiece is tightly fitted on the main shaft, the axis of the main shaft coincides with the axis of the grinding wheel on the desktop grinder, the main shaft is supported by the vertical bearing seat, the vertical bearing seat is connected with the supporting plate, and the side wall of the vertical bearing seat Strain gauges are fixed on the top, and the direction of the strain gauges is perpendicular to the axis of the spindle; when in use, the workpiece rotates with the spindle under the drive of the DC motor, and the grinding force of the grinding wheel on the workpiece is transmitted to the vertical bearing seat to generate strain, and the strain gauges detect detect the strain and transmit the signal to the control system single chip microcomputer, when the detected strain is greater than the preset value, the single chip microcomputer sends a signal to make the stepping motor reverse, and drives the rectangular slide table to carry the workpiece to move away from the grinding wheel, when the strain is detected If it is less than the preset value, the single-chip microcomputer sends a signal to make the stepper motor rotate forward, and drives the rectangular sliding table to carry the workpiece close to the grinding wheel, so as to realize the self-adaptation of the force during the grinding process.

As a preference, the vertical bearing seat is connected to the supporting plate through pads A and B to adjust its height from the center of the bearing and the supporting plate; the workpiece driving part also includes a supporting plate, an L-shaped supporting plate, DC motor support, the support plate is a square plate with a hole, which is fixedly connected with the rectangular slider, and the L-shaped support plate is fixed on the support plate by four hexagon socket bolts. The shape of the DC motor support is L-shaped. It is connected with the L-shaped support plate through four hexagonal bolts, and the DC motor bracket is fixed with the DC motor through two screws; the two ends of the workpiece are equipped with nylon gaskets and chucks that are symmetrically set on the main shaft, and the nylon gaskets are tight. Attached to the end face of the workpiece, the chuck is tightly attached to the nylon gasket, and is locked by two nuts on the head of the spindle.

The invention adjusts the steering and feed of the stepping motor by detecting the magnitude of the strain exceeding the preset range, and keeps the grinding force constant through the force feedback effect.

Compared with the prior art, the beneficial effect of the present invention is that it can effectively improve the surface grinding quality of non-circular surface parts, and improve the harm of grinding noise and dust to workers' health during the manual grinding process, and has simple structure and convenient operation. The workpiece is easy to clamp, the cost is low, and the product serialization degree is high. It is suitable for the grinding of small non-circular surface parts.

Description of drawings

Fig. 1 is an axonometric view of an adaptive grinding machine for non-circular surface parts.

Fig. 2 is a front view of the grinder shown in Fig. 1 .

Fig. 3 is a top view of the grinding machine shown in Fig. 1 .

Fig. 4 is a left side view of the grinder shown in Fig. 1 .

Fig. 5 is a front view of the workpiece driving part of the grinding machine shown in Fig. 1 .

In the figure: 1-stepping motor, 2-coupling support seat, 3-coupling A, 4-lead screw-guide rod support seat A, 5-guide rod, 6-lead screw, 7-rectangular slide table , 8-screw-guide rod support seat B, 9-support plate, 10-inner hexagon bolt, 11-L type support plate, 12-DC motor bracket, 13-external hexagon bolt, 14-DC motor, 15-screw , 16-coupling B, 17-spindle, 18-vertical bearing seat, 19-chuck, 20-nylon gasket, 21-workpiece, 22-nut, 23-block A, 24-block B, 25-external hexagonal bolts, 26-external hexagonal bolts, 27-strain gauges, 28-control system microcontroller, 29-desktop grinding machine, 30-grinding machine support, 31-base.

detailed description

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

The self-adaptive grinding machine for non-circular surface parts according to the embodiment of the present invention, as shown in Figures 1 to 5, the stepper motor 1 is linked with the lead screw 6 through the coupling A3, and the coupling A3 is placed in the coupling support seat 2 , the lead screw 6 is supported by the bearings in the lead screw-guide rod support seat A4 and the lead screw-guide rod support seat B8 which are arranged at both ends of the same structure, the lead screw-guide rod support seat A and the lead screw-guide rod support seat A The support seat B is fixed on the base 31, and a rectangular sliding table 7 is arranged on the screw, and there are three through holes on the rectangular sliding table, and the middle hole is a threaded hole, which can realize the movement of the rectangular sliding table by cooperating with the screw 6, and the two sides are Symmetrically distributed light holes, two guide rods 5 pass through it to play a supporting and guiding role, and the two ends of the guide rod 5 are fixed on the lead screw-guide rod support seat A4 and the lead screw-guide rod support seat B8 through the top wire, the rectangular slide Table 7 is connected with workpiece driving part, and workpiece driving part is made up of support plate 9, L-shaped support plate 11, DC motor support 12 and DC motor 14, through support plate 9, L-shaped support plate 11 and DC motor support 12 and DC motor 14 connections, the support plate is a square plate with a hole, the L-shaped support plate is fixed on the support plate by four hexagon socket bolts 10, the shape of the DC motor support is L-shaped, and it is connected to the L-shaped support plate by four external hexagon bolts 13 Connection, the DC motor bracket 12 and the DC motor 14 are fixed by two screws 15 . The DC motor is connected to the main shaft 17 through the coupling B16. The main shaft is supported by the vertical bearing seat 18. The vertical bearing seat is placed on the supporting plate through the pad A23 and the pad B24 to ensure the height of the bearing center and the bottom surface. The vertical bearing seat , spacer A, spacer B, support plate are connected and fixed by outer hexagonal bolt 25, outer hexagonal bolt 26, and strain gauge 27 is attached on the side wall of vertical bearing block 18, and strain gauge direction is perpendicular to main shaft axis. The signals collected by the strain gauges will be input into the single-chip microcomputer 28 of the control system for analysis. The workpiece 21 is set on the main shaft 17, and the two sides of the workpiece are symmetrically provided with nylon gaskets 20 and chucks 19. The nylon gaskets are close to the end surface of the workpiece, and the chuck is close to the nylon gaskets. Two nuts 22 arranged on the head of the main shaft lock tight. Grinding device directly selects small-sized desktop grinding machine 29 for use, is connected on the grinding machine support 30 with bolt, guarantees that emery wheel is consistent with workpiece height.

When the present invention is in use, the grinding force of the grinding wheel to the workpiece is transmitted to the vertical bearing seat 18 to cause strain. The strain gauge 27 detects the strain and transmits the signal to the control system single-chip microcomputer 28. When it is detected that the strain exceeds the predetermined Within the set value range, the single-chip microcomputer sends a signal to make the stepper motor 1 reverse, thereby driving the screw rod 6 to reverse, so that the slide table 7 carries the workpiece 21 and moves away from the desktop grinder 29. On the contrary, when the detected strain is less than In the preset range, the single-chip microcomputer sends a signal to make the stepping motor 1 rotate forward, thereby driving the screw rod 6 to rotate forward, so that the sliding table 7 carries the workpiece 21 and moves towards the direction close to the desktop grinder 29, and through the feedback of force, the grinder The cutting force remains constant, thereby improving the surface grinding quality of non-circular curved parts.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical scheme of the present invention and its design The replacement or change of equivalent concept should be covered within the protection scope of the claims of the present invention.

Claims (4)

1. An adaptive grinding machine for parts with non-circular curved surfaces, comprising a base and a desktop grinding machine, the desktop grinding machine is fixed on the base by a grinding machine support, it is characterized in that the base is also provided with a grinding machine adaptive mechanism, The self-adaptive mechanism of the grinding machine includes a stepping motor, the shaft of the stepping motor is connected to the lead screw through a coupling A, and the lead screw is arranged at its two ends and has the same structure as the lead screw-guide rod support seat A and the lead screw- The bearing support in the guide rod support seat B, the screw-guide rod support seat A and the screw-guide rod support seat B are fixed on the base, a rectangular sliding table is arranged on the screw, and there are three through holes on the rectangular sliding table , the middle hole is a threaded hole, and the movement of the rectangular slider can be realized by cooperating with the lead screw. The two sides are symmetrically distributed light holes. Two guide rods pass through it to support and guide. The two ends of the guide rod are fixed on the lead screw through the top screw. - On the guide rod support seat A and the lead screw-guide rod support seat B, the rectangular slider is connected with the workpiece driving part, and the workpiece drive part includes a DC motor, and the DC motor shaft is connected with the main shaft through the coupling B, and Tightly sleeved on the main shaft, the axis of the main shaft coincides with the axis of the grinding wheel on the desktop grinder, the main shaft is supported by a vertical bearing seat, the vertical bearing seat is connected with the supporting plate, and the side wall of the vertical bearing seat is fixed with a strain gauge, a strain gauge The direction is perpendicular to the spindle axis; when in use, the workpiece rotates with the spindle under the drive of the DC motor, and the grinding force of the grinding wheel on the workpiece is transmitted to the vertical bearing seat to generate strain, and the strain gauge detects the strain and transmits the signal to the control In the single-chip microcomputer of the system, when the detected strain is greater than the preset value, the single-chip microcomputer sends a signal to make the stepping motor reverse, and drives the rectangular sliding table to carry the workpiece to move away from the grinding wheel. When the detected strain is smaller than the preset value, the single-chip microcomputer sends a signal , so that the stepper motor rotates forward, and drives the rectangular sliding table to carry the workpiece close to the grinding wheel, so as to realize the self-adaptation of the force during the grinding process. 2. The self-adaptive grinding machine for non-circular surface parts according to claim 1, wherein the vertical bearing seat is connected to the supporting plate through pads A and B to adjust its distance from the center of the bearing and the height of the support plate. 3. The adaptive grinding machine for non-circular curved surface parts according to claim 1, wherein the workpiece driving part also includes a support plate, an L-shaped support plate, and a DC motor bracket, and the support plate is a belt with a hole The square plate is fixedly connected with the rectangular slider. The L-shaped support plate is fixed on the support plate by four hexagon socket bolts. The shape of the DC motor support is L-shaped. connection, the DC motor bracket is fixed with the DC motor by two screws. 4. The self-adaptive grinding machine for non-circular surface parts according to claim 1, characterized in that, the two ends of the workpiece are provided with nylon gaskets and the chuck is symmetrically set on the main shaft, and the nylon gasket is close to the end surface of the workpiece , the chuck is close to the nylon gasket and locked by two nuts on the head of the main shaft.