Cylindrical grinding machine

Abstract

According to the cylindrical grinding machine, the weight of a machine body is reduced through a concave cavity, an inner bottom reinforcing rib and a reinforcing bottom plate which are vertically connected through a reinforcing column are arranged in the concave cavity, the adverse effect of the concave cavity on the structural strength of the machine body is made up, and the machine body has the advantages of being light in weight and high in structural strength at the same time. Besides, different from an existing cylindrical grinding machine which adjusts the position of the workpiece relative to the grinding wheel by sliding a workbench, the position of the grinding wheel relative to the workpiece can be adjusted by sliding the transverse sliding table, so that the machining position of the workpiece is adjusted, and movement of the grinding wheel frame with the small size replaces movement of the workbench with the large size. The required lathe bed is short, so that the size and the weight of the cylindrical grinding machine can be further reduced; the cylindrical grinding machine not only is convenient to transport and install, but also can provide a stable supporting function for parts executing machining actions on the cylindrical grinding machine, and has good operation stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining equipment, and particularly relates to an external cylindrical grinding machine. Background Art

[0002] An external cylindrical grinding machine is a grinding machine for machining the outer surface and the end face of the shaft shoulder of a workpiece with a cylindrical, conical or other shape generatrix; its structure includes a bed body, on which a workbench for fixing the workpiece is slidably connected, and the length directions of the workbench and the bed body correspond to each other. The workbench can slide along the length direction of the bed body to adjust the position of the workpiece; a headstock and a tailstock are respectively arranged at both ends of the workbench, and centers with opposite tips are respectively fixed on the headstock and the tailstock. During machining, the two centers respectively abut against both ends of the workpiece to fix the workpiece. A dial driven by a motor is also arranged on the headstock. The dial is movably sleeved outside the center, and the workpiece is driven to rotate through a fork and a stop rod synchronously sleeved on the workpiece; on the width direction of the bed body, a grinding wheel frame is arranged on one side of the workbench, and a grinding wheel driven by a motor is arranged on the grinding wheel frame. Generally, the grinding wheel frame is slidably connected with the bed body, and the feed amount is adjusted by sliding along the width direction of the bed body.

[0003] As the base of the external cylindrical grinding machine, the bed body plays a role in installing, fixing and supporting structures such as the workbench and the grinding wheel frame. To improve the operation stability and machining accuracy of the external cylindrical grinding machine, the structural strength of the bed body is relatively important; therefore, the bed bodies of some existing external cylindrical grinding machines are relatively thick rectangular structures. Although they have high structural strength and can effectively ensure the operation stability and provide better basic conditions for high-precision machining, they will cause the external cylindrical grinding machine to be too heavy, which is not only unfavorable for transportation and installation, but also has high requirements for the strength of the supporting surface for installing the external cylindrical grinding machine. After long-term operation, the supporting surface is prone to cracking and subsidence, etc., which will cause the bed body to be skewed and requires frequent adjustment and maintenance; there are also some external cylindrical grinding machines that adopt a rectangular structure with a concave cavity at the bottom and a relatively thin wall thickness to reduce the weight of the bed body, and support columns for abutting against the supporting surface are added at the bottom of the concave cavity or reinforcing ribs are added at the bottom of the concave cavity to improve the structural strength, but the effect is poor.

[0004] Therefore, it is necessary to design an external cylindrical grinding machine with better bed body structural strength and lighter weight to improve the reliability of the structure, the operation stability during long-term operation and the machining accuracy. Summary of the Invention

[0005] Aiming at the above deficiencies of the prior art, the purpose of the utility model is to provide an external cylindrical grinding machine, which solves the technical problems of the heavy bed body and poor structural strength of the current external cylindrical grinding machine, and achieves the effect of improving the operation stability of the external cylindrical grinding machine.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] An external cylindrical grinding machine includes a bed in a rectangular shape with a rectangular cavity provided at the bottom correspondingly. A grid-shaped inner bottom reinforcing rib is formed by the convexity at the bottom of the cavity. The inner bottom reinforcing rib includes transverse ribs extending along the length direction of the bed and longitudinal ribs extending along the width direction of the bed. The ends of the transverse ribs and longitudinal ribs are connected to the corresponding side walls of the cavity; A grid-shaped reinforcing bottom plate is provided near the bottom of the bed in the cavity. The reinforcing bottom plate includes transverse plates extending along the length direction of the bed and longitudinal plates extending along the width direction of the bed. The ends of the transverse plates and longitudinal plates are connected to the corresponding side walls of the cavity. The transverse plates are opposite to the transverse ribs, and the longitudinal plates are opposite to the longitudinal ribs; A reinforcing column is vertically connected between the intersection of the longitudinal ribs and transverse ribs and the reinforcing bottom plate.

[0008] Further, lateral reinforcing ribs are connected between the ends of the transverse ribs and longitudinal ribs and the corresponding side walls of the cavity. The lateral reinforcing ribs extend from the bottom of the cavity towards the bottom of the bed.

[0009] Further, the thickness of the lateral reinforcing rib corresponds to the thickness of the connected transverse rib or longitudinal rib, and the width of the lateral reinforcing rib decreases in the direction from the bottom of the cavity to the bottom of the bed.

[0010] Further, the lateral reinforcing rib directly below the transverse plate extends to be connected to the transverse plate, and the lateral reinforcing rib directly below the longitudinal plate extends to be connected to the longitudinal plate.

[0011] Further, the spacing between adjacent transverse ribs is the same, there is one transverse rib between adjacent transverse plates, the spacing between adjacent longitudinal ribs is the same, and there is one longitudinal rib between adjacent longitudinal plates.

[0012] Further, the reinforcing column is composed of a horizontal and vertical plate and a longitudinal and vertical plate that intersect vertically and has a cross-section in a cross shape. The width direction of the horizontal and vertical plate corresponds to the length direction of the cavity, the thickness of the horizontal and vertical plate corresponds to the thickness of the transverse rib, the width direction of the longitudinal and vertical plate corresponds to the width direction of the cavity, and the thickness of the longitudinal and vertical plate corresponds to the thickness of the longitudinal rib.

[0013] Further, an inclined reinforcing rib is connected between one end of the reinforcing column connected to the intersection of the transverse plate and longitudinal plate and one end of the adjacent reinforcing column or the side wall of the cavity.

[0014] Further, rectangular protrusions inward are provided at the four corners and the middle parts of the two long sides of the cavity opening. Rectangular grooves are provided at the corresponding positions on the outer side surface of the bed. A longitudinal plate is connected between the rectangular protrusions at the middle parts of the two long sides.

[0015] Further, a workbench is fixedly provided on the bed. On one side of the workbench in the width direction of the bed, a grinding wheel frame is provided. A double-axis adjustment seat is provided between the grinding wheel frame and the bed. The double-axis adjustment seat can adjust the position of the grinding wheel frame along the length direction and width direction of the bed respectively.

[0016] Further, the biaxial adjustment seat includes two parallel transverse linear guide rails arranged along the length direction of the bed body. A transverse lead screw driven by a motor is arranged in parallel between the two transverse linear guide rails. A transverse slide table is arranged above the transverse linear guide rails. The transverse slide table is respectively connected with the slide seats of the two transverse linear guide rails and the nut seat of the transverse lead screw. Two parallel longitudinal linear guide rails arranged along the width direction of the bed body are arranged on the transverse slide table. A longitudinal lead screw driven by a motor is arranged in parallel between the two longitudinal linear guide rails. A longitudinal slide table is arranged above the longitudinal linear guide rails. The longitudinal slide table is respectively connected with the slide seats of the two longitudinal linear guide rails and the nut seat of the longitudinal lead screw. The grinding wheel is mounted on the longitudinal slide table.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. For the cylindrical grinder of the utility model, the weight of the bed body is reduced by the concave cavity, and an inner bottom reinforcing rib and a reinforcing bottom plate vertically connected by a reinforcing column are arranged in the concave cavity, compensating for the adverse effect of the concave cavity on the structural strength of the bed body, so that the bed body has the advantages of light weight and high structural strength at the same time. This is not only beneficial to the transportation and installation of the cylindrical grinder, but also can provide a relatively stable supporting effect for the components performing processing actions thereon, which is conducive to improving the operation stability of the cylindrical grinder.

[0019] 2. Different from the existing cylindrical grinder that adjusts the position of the workpiece relative to the grinding wheel through a sliding workbench, the utility model adopts the grinding wheel adjustment structure. It can not only adjust the machining feed amount by sliding the longitudinal slide table, but also adjust the position of the grinding wheel relative to the workpiece by sliding the transverse slide table, thereby adjusting the machining position of the workpiece. By moving the relatively small grinding wheel frame instead of the relatively large workbench, the required length of the bed body is shorter, which is beneficial to further reducing the volume and weight of the cylindrical grinder and reducing the floor area occupied when the cylindrical grinder is in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a perspective view of a cylindrical grinder in an upward view for the embodiment;

[0021] Figure 2 It is a perspective view of a cylindrical grinder in a downward view for the embodiment;

[0022] Wherein, the bed body 1, the concave cavity 11, the convex package 12, the transverse rib 21, the longitudinal rib 22, the transverse plate 31, the longitudinal plate 32, the reinforcing column 4, the first rectangular bin 51, the second bin 52, the lateral reinforcing rib 6, the oblique reinforcing rib 7, the workbench 8, the transverse linear guide rail 91, the transverse slide table 92, the longitudinal linear guide rail 93, the longitudinal slide table 94, the grinding wheel frame 10. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model.

[0024] Embodiment:

[0025] Please refer to Figure 1 , an external cylindrical grinder, including a bed 1 in a rectangular shape with a rectangular cavity 11 correspondingly provided at the bottom. A bottom raised portion of the cavity 11 forms an inner bottom reinforcing rib in a uniform grid shape. The inner bottom reinforcing rib includes a transverse rib 21 extending along the length direction of the bed 1 and a longitudinal rib 22 extending along the width direction of the bed 1. The ends of the transverse rib 21 and the longitudinal rib 22 are connected to the corresponding side walls of the cavity 11; near the bottom of the bed 1 in the cavity 11, a reinforcing bottom plate in a uniform grid shape is provided. The reinforcing bottom plate includes a transverse plate 31 extending along the length direction of the bed 1 and a longitudinal plate 32 extending along the width direction of the bed 1. The ends of the transverse plate 31 and the longitudinal plate 32 are connected to the corresponding side walls of the cavity 11; the transverse plate 31 is opposite to the transverse rib 21 and the distance between adjacent transverse plates 31 is greater than or equal to the distance between adjacent transverse ribs 21, the longitudinal plate 32 is opposite to the longitudinal rib 22 and the distance between adjacent longitudinal plates 32 is greater than or equal to the distance between adjacent longitudinal ribs 22; multiple reinforcing columns 4 are vertically connected between the intersection of the transverse rib 21 and the longitudinal rib 22 and the longitudinal plate 32. The reinforcing columns 4 connected to the same longitudinal plate 32 are equally spaced and the distance between adjacent reinforcing columns 4 is greater than or equal to the distance between adjacent two transverse ribs 21.

[0026] As Figure 1 shown, to accommodate the cooling water tank and the electrical control system of the external cylindrical grinder, a hollow first rectangular bin 51 and a second bin 52 are respectively provided near a corner and a side in the cavity 11. The first rectangular bin 51 and the second bin 52 are also respectively connected to the bottom of the cavity 11 to improve the structural strength of the bed 1; on this basis, in this embodiment, only three transverse ribs 21 and seven longitudinal ribs 22 are provided in the central area of the bottom of the cavity 11, and some of the transverse ribs 21 and longitudinal ribs 22 are truncated by the first rectangular bin 51 and the second bin 52; it is set that the distance between adjacent transverse plates 31 is twice the distance between adjacent transverse ribs 21, and it is set that the distance between adjacent longitudinal plates 32 is twice the distance between adjacent longitudinal ribs 22. On the bed 1 as Figure 1 shown, only one transverse plate 31 and three longitudinal plates 32 are provided in the central area of the bottom of the bed 1, and the transverse plate 31 and one longitudinal plate 32 are truncated by the first rectangular bin 51; it is set that the distance between adjacent reinforcing columns 4 below the longitudinal plates 32 on both sides is equal to the distance between adjacent two transverse ribs 21, and it is set that the distance between adjacent reinforcing columns 4 below the middle longitudinal plate 32 is twice the distance between adjacent two transverse ribs 21. On the bed 1 as Figure 1 shown, there are three reinforcing columns 4 respectively below the longitudinal plates 32 on both sides, and only one reinforcing column 4 is provided in the middle below the middle longitudinal plate 32.

[0027] For the bed body 1 of the cylindrical grinder described in the present utility model, a rectangular concave cavity 11 corresponding to the bed body 1 is provided at the bottom of the bed body 1, so that the bed body 1 has a box-shaped structure with an open bottom end and a relatively thin wall thickness, thereby effectively reducing the weight of the bed body 1; an inner bottom reinforcing rib is provided at the bottom of the concave cavity 11, so that the table surface of the closed end of the bed body 1 for installing components such as the workbench 8 and the grinding wheel frame 10 has better structural strength, providing a stable foundation for the processing actions of each component; a reinforcing bottom plate is provided in the concave cavity 11 near the bottom of the bed body 1 to strengthen the connection strength between the side walls of the concave cavity 11 (the wall plates of the bed body 1) and reduce the possibility of unilateral deformation; a reinforcing column 4 is provided between the inner bottom reinforcing rib and the reinforcing bottom plate to further strengthen the connection strength between the bottom of the concave cavity 11 and the side walls of the concave cavity 11, making the structure of the concave cavity 11 more stable and reliable; by means of the concave cavity 11, the present utility model reduces the weight of the bed body 1, and an inner bottom reinforcing rib and a reinforcing bottom plate vertically connected by the reinforcing column 4 are provided in the concave cavity 11 to make up for the adverse effects of the concave cavity 11 on the structural strength of the bed body 1, enabling the bed body 1 to have the advantages of both light weight and relatively high structural strength, which is not only beneficial to the transportation and installation of the cylindrical grinder, but also can provide a relatively stable supporting effect for the components performing processing actions thereon, facilitating the improvement of the operating stability of the cylindrical grinder.

[0028] Please refer to Figure 1 , lateral reinforcing ribs 6 are connected between the ends of the transverse ribs 21 and the longitudinal ribs 22 and the corresponding side walls of the concave cavity 11, and the lateral reinforcing ribs 6 extend from the bottom of the concave cavity 11 to the bottom of the bed body 1; in this way, the inner bottom reinforcing rib can not only strengthen the structural strength of the closed end of the bed body 1, but also strengthen the connection strength between the closed end and the side walls of the concave cavity 11 through the lateral reinforcing ribs 6.

[0029] Please refer to Figure 1 , the thickness of the lateral reinforcing rib 6 corresponds to the thickness of the connected transverse rib 21 or longitudinal rib 22, and the width of the lateral reinforcing rib 6 decreases in the direction from the bottom of the concave cavity 11 to the bottom of the bed body 1; in this way, while ensuring the connection strength between the bottom of the concave cavity 11 and the side walls of the concave cavity 11, the material consumption of the lateral reinforcing rib 6 is reduced, which is beneficial to reducing and controlling the weight of the bed body 1.

[0030] Please refer to Figure 1 , the lateral reinforcing rib 6 directly below the transverse plate 31 extends to be connected with the transverse plate 31, and the lateral reinforcing rib 6 directly below the longitudinal plate 32 extends to be connected with the longitudinal plate 32; in this way, not only can the connection strength between the ends of the transverse plate 31 and the longitudinal plate 32 and the side walls of the concave cavity 11 be strengthened, but also the inner bottom reinforcing rib and the reinforcing bottom plate are connected not only through the reinforcing column 4, but also through the lateral reinforcing rib 6, which is beneficial to further strengthening the connection strength between the bottom of the concave cavity 11 and the side walls of the concave cavity 11.

[0031] Please refer to Figure 1, the strengthening column 4 is composed of vertically intersecting horizontal and vertical plates and longitudinal and vertical plates, and its cross-section is cross-shaped. The width direction of the horizontal and vertical plates corresponds to the length direction of the concave cavity 11, the thickness of the horizontal and vertical plates corresponds to the thickness of the transverse rib 21, the width direction of the longitudinal and vertical plates corresponds to the width direction of the concave cavity 11, and the thickness of the longitudinal and vertical plates corresponds to the thickness of the longitudinal rib 22. In this way, while ensuring the structural strength of the strengthening column 4, it is beneficial to reduce the weight of the strengthening column 4.

[0032] Please refer to Figure 1 , one end of the strengthening column 4 connected to the intersection of the transverse plate 31 and the longitudinal plate 32 is connected to one end of the adjacent strengthening column 4 or the side wall of the concave cavity 11 by an inclined strengthening rib 7. In this way, it is beneficial to further strengthen the connection strength between the bottom of the concave cavity 11 and the side wall of the concave cavity 11.

[0033] Please refer to Figure 1 , the four corners and the middle parts of the two long sides of the mouth of the concave cavity 11 have inward rectangular protrusions, and rectangular grooves are provided at the positions corresponding to the rectangular protrusions on the outer side surface of the bed body 1. The rectangular protrusions and the rectangular grooves form an inward convex bulge 12, and a longitudinal plate 32 is connected between the rectangular protrusions in the middle parts of the two long sides. In this way, by providing the convex bulge 12, not only the connection strength between the adjacent side walls of the concave cavity 11 is enhanced, but also the local strength of the side wall of the concave cavity 11 is enhanced, which is beneficial to improving the connection strength between the side wall of the concave cavity 11 and the corresponding longitudinal plate 32.

[0034] Please refer to Figure 2 , a workbench 8 is fixedly provided on the bed body 1. On the width direction of the bed body 1, a grinding wheel frame 10 is provided on one side of the workbench 8 for installing a grinding wheel. A double-axis adjustment seat is provided between the grinding wheel frame 10 and the bed body 1, and the double-axis adjustment seat can adjust the position of the grinding wheel frame 10 along the length direction and the width direction of the bed body 1 respectively. Specifically, the double-axis adjustment seat includes two parallel transverse linear guides 91 arranged along the length direction of the bed body 1. A transverse lead screw (not shown in the figure) driven by a motor is arranged in parallel between the two transverse linear guides 91. A transverse slide 92 is provided above the transverse linear guides 91, and the transverse slide 92 is respectively connected to the slide seats of the two transverse linear guides 91 and the nut seat of the transverse lead screw. Two parallel longitudinal linear guides 93 arranged along the width direction of the bed body 1 are provided on the transverse slide 92. A longitudinal lead screw (not shown in the figure) driven by a motor is arranged in parallel between the two longitudinal linear guides 93. A longitudinal slide 94 is provided above the longitudinal linear guides 93, and the longitudinal slide 94 is respectively connected to the slide seats of the two longitudinal linear guides 93 and the nut seat of the longitudinal lead screw. The grinding wheel frame 10 is arranged on the longitudinal slide 94.

[0035] In this way, different from the existing cylindrical grinding machines that adjust the position of the workpiece relative to the grinding wheel through the sliding workbench 8, the present utility model adopts the grinding wheel adjustment structure. It can not only adjust the machining feed rate by sliding the longitudinal slide 94, but also adjust the position of the grinding wheel relative to the workpiece by sliding the transverse slide 92, so as to adjust the machining position of the workpiece. By moving the smaller grinding wheel headstock 10 instead of the larger workbench 8, the required length of the machine bed 1 is shorter, which is beneficial to further reducing the volume and weight of the cylindrical grinding machine and reducing the floor area occupied when the cylindrical grinding machine is in use.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit the technical solutions. Those of ordinary skill in the art should understand that any modifications or equivalent replacements made to the technical solutions of the present utility model without departing from the purpose and scope of the present technical solution should be covered within the scope of the claims of the present utility model.

Claims

1. An external cylindrical grinding machine, characterized in that: It includes a bed body in a rectangular shape with a rectangular cavity correspondingly provided at the bottom. A grid-shaped inner bottom reinforcing rib is formed by the bottom of the cavity protruding. The inner bottom reinforcing rib includes transverse ribs extending along the length direction of the bed body and longitudinal ribs extending along the width direction of the bed body. The ends of the transverse ribs and the longitudinal ribs are connected to the corresponding cavity side walls; a grid-shaped reinforcing bottom plate is provided near the bottom of the bed body in the cavity. The reinforcing bottom plate includes transverse plates extending along the length direction of the bed body and longitudinal plates extending along the width direction of the bed body. The ends of the transverse plates and the longitudinal plates are connected to the corresponding cavity side walls. The transverse plates are opposite to the transverse ribs, and the longitudinal plates are opposite to the longitudinal ribs; a reinforcing column is vertically connected between the intersection of the longitudinal ribs and the transverse ribs and the reinforcing bottom plate.

2. The external cylindrical grinder according to claim 1, characterized in that: Lateral reinforcing ribs are connected between the ends of the transverse ribs and the longitudinal ribs and the corresponding cavity side walls. The lateral reinforcing ribs extend from the bottom of the cavity towards the bottom of the bed body.

3. The cylindrical grinder according to claim 2, wherein: The thickness of the lateral reinforcing rib corresponds to the thickness of the connected transverse rib or longitudinal rib, and the width of the lateral reinforcing rib decreases in the direction from the bottom of the cavity to the bottom of the bed body.

4. The cylindrical grinder according to claim 3, wherein: The lateral reinforcing rib directly below the transverse plate extends to be connected to the transverse plate, and the lateral reinforcing rib directly below the longitudinal plate extends to be connected to the longitudinal plate.

5. The external cylindrical grinding machine according to claim 1, wherein: The spacing between adjacent transverse ribs is the same. There is a transverse rib between adjacent transverse plates. The spacing between adjacent longitudinal ribs is the same. There is a longitudinal rib between adjacent longitudinal plates.

6. The cylindrical grinder according to claim 1, characterized in that: The reinforcing column is composed of a horizontal and vertical plate and a longitudinal and vertical plate that vertically intersect and has a cross-section in a cross shape. The width direction of the horizontal and vertical plate corresponds to the length direction of the cavity. The thickness of the horizontal and vertical plate corresponds to the thickness of the transverse rib. The width direction of the longitudinal and vertical plate corresponds to the width direction of the cavity. The thickness of the longitudinal and vertical plate corresponds to the thickness of the longitudinal rib.

7. The cylindrical grinder according to claim 1, wherein: An inclined reinforcing rib is connected between one end of the reinforcing column connected to the intersection of the transverse plate and the longitudinal plate and one end of the adjacent reinforcing column or the cavity side wall.

8. The external cylindrical grinder according to claim 1, wherein: Rectangular protrusions inward are provided at the four corners and the middle of the two long sides of the cavity opening. Rectangular grooves are provided at the corresponding positions on the outer side surface of the bed body to the rectangular protrusions. A longitudinal plate is connected between the rectangular protrusions in the middle of the two long sides.

9. The external cylindrical grinder according to claim 1, characterized in that: A workbench is fixedly provided on the bed body. On one side of the workbench in the width direction of the bed body, a grinding wheel stand is provided. A double-axis adjustment seat is provided between the grinding wheel stand and the bed body. The double-axis adjustment seat can adjust the position of the grinding wheel stand along the length direction and the width direction of the bed body respectively.

10. The cylindrical grinding machine according to claim 9, characterized in that: The double-axis adjustment seat includes two parallel transverse linear guides arranged along the length direction of the bed body. A transverse lead screw driven by a motor is arranged in parallel between the two transverse linear guides. A transverse slide is provided above the transverse linear guides. The transverse slide is respectively connected to the slide seats of the two transverse linear guides and the nut seat of the transverse lead screw; two parallel longitudinal linear guides arranged along the width direction of the bed body are provided on the transverse slide. A longitudinal lead screw driven by a motor is arranged in parallel between the two longitudinal linear guides. A longitudinal slide is provided above the longitudinal linear guides. The longitudinal slide is respectively connected to the slide seats of the two longitudinal linear guides and the nut seat of the longitudinal lead screw. The grinding wheel stand is arranged on the longitudinal slide.

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