Precise grinding device for outer circle end face with inner threaded hole

Abstract

The utility model provides an outer circle end face accurate grinding device with an inner threaded hole, which is arranged on a grinding machine, is used for grinding the outer circle end face of a product to be machined, and comprises an outer circle clamp, a measuring device and a grinding appliance. According to the accurate grinding device for the outer circle end face with the inner threaded hole, an original two-tip clamping and positioning structure is changed into an outer circle clamping and positioning structure, the outer circle end face of a to-be-machined product faces outwards vertically, the measuring head extends into the inner hole and is arranged at a specific screw groove of the inner threaded hole, a datum point is set, and the outer circle end face of the to-be-machined product is clamped and positioned through the outer circle clamping and positioning structure. And the grinding machine sets the grinding size according to the reference point for grinding, so that the purpose of accurately controlling the size after grinding can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of automobile parts precision machining technology, especially relate to a accurate grinding device of the outer circle end face with internal thread hole. BACKGROUND

[0002] In the precision machining of parts and advanced parts manufacturing equipment, the grinding machine grinds the workpiece surface through the grinding tool coated or embedded with abrasive material installed thereon, and is mainly used for grinding high-precision planes, inner and outer cylindrical surfaces, conical surfaces, spherical surfaces, threaded surfaces and other profiles in workpieces.

[0003] In grinding the automobile parts products as shown in Figure 1a , Figure 1b , since there are many features to be ground (the gray shaded part represents the features to be processed), and there is a high relative position relationship between the features (for example, the concentricity of the two outer circles is 0.03, and the perpendicularity of the two end faces is 0.01), a tool is needed to position and clamp the product, so as to ensure that the processed product meets the drawing requirements.

[0004] In order to process the above-mentioned products, the design scheme of the commonly used equipment fixture and grinding device is as shown in Figure 2 , mainly comprising: a grinder headstock end center 01, a tailstock end center 02, a product to be processed 03, a grinding wheel 041 (grinding outer cylindrical surface A), a grinding wheel 042 (grinding outer end surface B), a grinding wheel 043 (grinding outer cylindrical surface C), a grinding wheel 044 (grinding outer end surface D) and an end surface positioning gauge 05 forming a center clamping and positioning structure.

[0005] In controlling the size of a specific screw groove from the outer end surface B to the internal thread hole 20.5±0.025 as shown in Figure 3 , the grinding wheel 042 in Figure 2 is used to grind the outer end surface B, and the usual processing method is: taking the end surface positioning gauge 05 as a reference, and grinding according to the size defined by the previous process to reserve a processing allowance of 20.625±0.025 (20.625-20.5=0.125 allowance), since the actual allowance is jointly affected by the processing tolerance of the previous process and the heat treatment deformation, the allowance of each product is different, and the size of 20.5±0.025 cannot be guaranteed after final grinding, so manual measurement with a gauge is needed to select qualified products, the product qualification rate is low, and the labor cost and processing cost are increased.

[0006] In controlling the size from the outer end surface D to the internal thread hole as shown in Figure 3 , the same problem as described above exists. INVENTION CONTENTS

[0007] The utility model discloses a kind of outer circle end face accurate grinding devices of inner thread hole, be set on grinding machine, for grinding the outer circle end face of the workpiece to be processed, including:

[0008] To achieve the above object, the solution adopted by the utility model is as follows:

[0009] The utility model provides a kind of outer circle end face accurate grinding devices of inner thread hole, be set on grinding machine, for grinding the outer circle end face of the workpiece to be processed, including:

[0010] Outer circle clamp, the outer circle of the workpiece to be processed is clamped and positioned, and the outer circle end face of the workpiece to be processed is vertically outward;

[0011] Measuring device, including measuring head, the measuring head is located at the position of a specific screw groove of the inner thread hole, and is set as the reference point for accurately measuring the distance from the outer circle end face to a specific screw groove of the inner thread hole;

[0012] Grinding tool, the end surface of the grinding tool is in contact with the outer circle end face to be processed, and the grinding machine sets the grinding size with the reference point, and the outer circle end face of the workpiece to be processed is ground to accurately control the size of the outer circle end face to a specific screw groove of the inner thread hole.

[0013] Preferably, the workpiece to be processed is a cylinder, and an inner threaded blind hole is arranged in the cylinder, and the closed end of the cylinder is the outer circle end face to be processed.

[0014] Preferably, the workpiece to be processed is a cylinder, and an inner threaded blind hole is arranged in the cylinder, and the open end of the cylinder is the outer circle end face to be processed.

[0015] Preferably, the workpiece to be processed is two cylinders with different diameters, an inner threaded hole is arranged in the large-diameter cylinder, and a stepped annular end face is formed between the large-diameter cylinder and the small-diameter cylinder, and the stepped annular end face is the outer circle end face to be processed.

[0016] Preferably, the workpiece to be processed is two cylinders with different diameters, an inner threaded hole is arranged in the large-diameter cylinder or the small-diameter cylinder, and the open end of the large-diameter cylinder or the small-diameter cylinder is the outer circle end face to be processed.

[0017] Preferably, the outer circle clamp clamps and positions the outer circle of the workpiece to be processed, the axis of the workpiece to be processed is in a horizontal direction, and the outer circle end face of the workpiece to be processed is vertically outward.

[0018] Preferably, the grinding tool is a grinding wheel.

[0019] Preferably, an airtight detection hole in communication with an external airtight device is formed in the outer circle clamp.

[0020] Advantages

[0021] The utility model provides a kind of outer circle end face accurate grinding device of inner thread hole, it is changed from the two center clamping positioning structure to outer circle clamping positioning structure, the outer circle end face of the product to be processed is perpendicular to outward, the measuring head is inserted into inner hole and placed in a specific screw groove of inner thread hole, it is set as reference point, grinding size is set according to the reference point by grinding machine, grinding is carried out, the purpose of accurately controlling the size after grinding can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1a It is a structure diagram of an angle of the product to be processed.

[0023] Figure 1b It is a structure diagram of another angle of the product to be processed.

[0024] Figure 2 It is a structure diagram of the existing grinding device.

[0025] Figure 3 It is a plane structure diagram of the size 20.5±0.025 of the product to be processed which needs to be controlled.

[0026] Figure 4 It is a plane structure diagram of the outer circle end face accurate grinding device of inner thread hole. DETAILED DESCRIPTION

[0027] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0029] It should be noted that: similar signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the utility model, it is necessary to explain that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relation shown in the drawings, or is the orientation or position relation commonly placed when the utility model product is used, and is merely for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are merely used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" merely means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the utility model, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "setting", "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] To this end, the following scheme is proposed:

[0034] Example 1:

[0035] Referring to Figure 4 , the utility model provides a kind of outer circle end face accurate grinding device of internal thread hole, it is set to grinding machine, including outer circle fixture 10, measuring device 20 and grinding tool 30.

[0036] In the embodiments of the utility model, as shown in the grinding mentioned in background art, such as Figure 1a 、 Figure 1b Automobile parts product is taken as Figure 4 Processing product 100 in The processing product 100 is two different diameter cylinders 110, 120, an internal thread hole 111 is provided in large diameter cylinder 110, an internal light hole 121 is provided in small diameter cylinder 120, a step annular end surface 130 is formed between large diameter cylinder 110 and small diameter cylinder 120, and the step annular end surface 130 is the outer circle end face B to be processed in the embodiment, and is controlled with Figure 3The dimension from the outer circle end surface B to one specific screw groove of the internal threaded hole 111 is 20.5±0.025.

[0037] In the outer circle end surface accurate grinding device with internal threaded hole, the outer circle clamp 10 clamps and positions the outer circle of the to-be-processed product 100, the axis of the to-be-processed product 100 is in a horizontal direction, and the to-be-processed outer circle end surface B of the to-be-processed product 100 is vertically outward (in the figure, the to-be-processed outer circle end surface B faces right). Figure 4

[0038] In the outer circle end surface accurate grinding device with internal threaded hole, the measuring device 20 comprises a measuring head 21, the measuring head 21 is located at the position of one specific screw groove of the internal threaded hole 111 of the to-be-processed product 100, and is set as a reference point for accurately measuring the distance from the to-be-processed outer circle end surface B to one specific screw groove of the internal threaded hole 111 of the to-be-processed product 100.

[0039] In the outer circle end surface accurate grinding device with internal threaded hole, the end surface of the grinding tool 30 is in contact with the to-be-processed outer circle end surface B, the grinding machine sets the grinding size according to the reference point, and grinds the outer circle end surface B of the to-be-processed product 100, so as to accurately control the dimension 20.5±0.025 from the outer circle end surface B to one specific screw groove of the internal threaded hole 111, so that the size of the grinding processing is not affected by the processing tolerance and heat treatment deformation of the previous process. In a specific embodiment, the grinding tool 30 is a grinding wheel.

[0040] In the outer circle end surface accurate grinding device with internal threaded hole, the airtight detection hole 11 in communication with the external airtight device is further arranged in the outer circle clamp 10. When the to-be-processed product 100 is fixed in the outer circle clamp 10, the to-be-processed product 100 blocks the airtight detection hole 11, and at this time, the external airtight device performs airtight detection between the outer circle clamp 10 and the to-be-processed product 100. If the detection result is qualified, the grinding machine can be operated to grind the to-be-processed product 100, and if the detection result is unqualified, the to-be-processed product 100 is taken out, the clamping condition of the workbench surface of the outer circle clamp 10 and the on-site working condition are checked, and the airtight detection result is qualified.

[0041] In the outer circle end surface accurate grinding device with internal threaded hole, the outer circle of the to-be-processed product 100 is first clamped in the outer circle clamp 10 and clamped and positioned, so that the axis of the to-be-processed product 100 is in a horizontal direction, and the to-be-processed outer circle end surface B is vertically outward (in the figure, the to-be-processed outer circle end surface B faces right). Figure 4 ​In the middle, the outer circle end face B to be processed faces the right side); then, the air tightness is detected through the air tightness detection hole 11, whether the product to be processed 100 is placed in place is confirmed; then, the measuring head 21 of the measuring device 20 is inserted from the right side of the internal thread hole 111, and points to the position of a specific screw groove of the internal thread hole 111; the grinding machine is set to take the position of the measuring head 21 as the reference point, and is ground to the size 20.5, so that the error in the previous process and the heat treatment deformation amount can be ignored, and the grinding size 20.5±0.025 can be accurately controlled.

[0042] The outer circle end face accurate grinding device with an internal thread hole and the grinding method can bring the following advantages:

[0043] 1) The influence of the size tolerance fluctuation of the previous process can be ignored;

[0044] 2) The influence of the heat treatment deformation can be ignored;

[0045] 3) The measured position of the controlled size is directly measured, and the size 20.5±0.025 defined in the drawing is ground according to the position of the measurement reference point;

[0046] 4) The original two-center clamping positioning fixture is changed into an outer circle clamping positioning fixture, and the fixture structure is simpler and more reliable.

[0047] Example 2:

[0048] Different from example 1, the outer circle end face to be processed is the opening end face D of a large-diameter cylinder. Figure 2

[0049] Example 3:

[0050] Different from example 1, the product to be processed is a cylinder, an internal thread blind hole is arranged in the cylinder, the closed end of the cylinder is the outer circle end face to be processed, and the size from the outer circle end face to a specific screw groove of the internal thread hole is accurately controlled.

[0051] Example 4:

[0052] Different from example 1, the product to be processed is a cylinder, an internal thread blind hole is arranged in the cylinder, the opening end of the cylinder is the outer circle end face to be processed, and the size from the outer circle end face to a specific screw groove of the internal thread hole is accurately controlled.

[0053] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principle of the utility model, and these improvements and refinements should also be regarded as the protection range of the utility model.​

Claims

1. An apparatus for accurately lapping an outer end surface of a workpiece having a hole with an internal thread, which is provided on a grinding machine and is used for lapping the outer end surface of the workpiece, characterized in that, The application relates to a device for accurately grinding an outer end surface of a workpiece with an internally threaded hole. The device comprises an outer clamping fixture for clamping and positioning the outer end surface of the workpiece, wherein the outer end surface is vertically outwardly directed; a measuring device comprising a measuring head located at a specific thread groove of the internally threaded hole, and serving as a reference point for accurately measuring the distance from the outer end surface to the specific thread groove of the internally threaded hole; and a grinding tool, the end surface of which is in contact with the outer end surface of the workpiece, and the grinding tool is set to a grinding size by the reference point, so as to grind the outer end surface of the workpiece and accurately control the size of the outer end surface to the specific thread groove of the internally threaded hole. The workpiece is a cylinder, and an internally threaded blind hole is arranged in the cylinder, and the closed end of the cylinder is the outer end surface to be machined. The workpiece is a cylinder, and an internally threaded blind hole is arranged in the cylinder, and the open end of the cylinder is the outer end surface to be machined.

2. The device for accurate lapping of the external cylindrical end face of the hole with internal thread according to claim 1, characterized in that The workpiece is two cylinders with different diameters, an internally threaded hole is arranged in the large-diameter cylinder, an internally threaded hole is arranged in the small-diameter cylinder, and a stepped annular end surface is formed between the large-diameter cylinder and the small-diameter cylinder, and the stepped annular end surface is the outer end surface to be machined.

3. The device for accurate lapping of the external cylindrical end face of the hole with internal thread according to claim 1, characterized in that, The workpiece is two cylinders with different diameters, an internally threaded hole is arranged in the large-diameter cylinder or the small-diameter cylinder, and the open end of the large-diameter cylinder or the small-diameter cylinder is the outer end surface to be machined.

4. The apparatus for precise lapping of an external cylindrical face with an internal thread hole according to claim 1, wherein The outer clamping fixture clamps and positions the outer end surface of the workpiece, the axis of the workpiece is in a horizontal direction, and the outer end surface of the workpiece is vertically outwardly directed.

5. The apparatus for precise lapping of the external cylindrical face with the internal thread hole according to claim 1, characterized in that, The grinding tool is a grinding wheel.

6. The apparatus according to any one of claims 2 to 5, wherein 8. The device for accurately grinding an outer end surface of a workpiece with an internally threaded hole according to claim 1, wherein a gas-tight detection hole is arranged in the outer clamping fixture and is in communication with an external gas-tight device.

7. The device for precise lapping of the external cylindrical end face of the hole with internal thread according to claim 1, characterized in that, ​ ​ ​

Images