Holding-up hammer grinding method

Abstract

The invention relates to a holding-up hammer grinding method. A holding-up hammer grinding machining method comprises the following steps that S1, a sectional view of a holding-up hammer blank is drawn, and a sectional view of a holding-up hammer product is drawn; s2, placing the holding-up hammer product section drawing in the holding-up hammer blank section drawing, so that the distance between the top surface of the holding-up hammer product section drawing and the top surface of the holding-up hammer blank section drawing is greater than or equal to a first set distance, and the outer edge line of the holding-up hammer product section drawing does not coincide with the outer edge line of the holding-up hammer blank section; s3, measuring the distance between the corresponding line of each surface of the holding-up hammer product sectional view and the corresponding line of each surface of the holding-up hammer blank sectional view; s4, extending a line corresponding to the outer circular surface of the section drawing of the anvil product, drawing an auxiliary line perpendicular to a line corresponding to the bottom surface of the section drawing of the anvil product, and measuring the shortest distance between an intersection point and the auxiliary line; and S5, the anvil blank is machined according to the grinding machining amount obtained in the step S3 and the step S4. The method has the advantages that the production cost can be reduced, and the machining allowance is convenient to calculate.

Description

Technical Field

[0001] The invention relates to a top hammer grinding method. Background Art

[0002] When producing top hammers, since the looseness ratio, sintering temperature and furnace conditions of each batch of raw materials are different, the final product sizes of the same mold pressing are different. The processing allowance of each batch of top hammer blanks is different, and multiple calculations and processing will result in more processing steps and higher production costs. Summary of the invention

[0003] The object of the present invention is to provide a top hammer grinding method which can reduce production cost and facilitate calculation of machining allowance.

[0004] To achieve the above object, the present invention adopts the following technical solution: a top hammer grinding method, comprising the following steps: S1. Measure the dimensions of each surface of the top hammer blank, draw a cross-sectional view of the top hammer blank according to the inclination of each surface, and draw a cross-sectional view of the top hammer product; S2. placing the cross-sectional view of the top hammer product in the cross-sectional view of the top hammer blank, so that the top surface of the cross-sectional view of the top hammer product is located below the top surface of the cross-sectional view of the top hammer blank, so that the distance between the top surface of the cross-sectional view of the top hammer product and the top surface of the cross-sectional view of the top hammer blank is greater than or equal to the first set distance, and the outer edge line of the cross-sectional view of the top hammer product does not overlap with the outer edge line of the cross-sectional view of the top hammer blank; S3. Measure the distance between the corresponding line of the large bevel of the cross-section of the top hammer product and the corresponding line of the large bevel of the cross-section of the top hammer blank, the distance between the corresponding line of the small bevel of the cross-section of the top hammer product and the corresponding line of the small bevel of the cross-section of the top hammer blank, the distance between the corresponding line of the outer cylindrical surface of the cross-section of the top hammer product and the corresponding line of the outer cylindrical surface of the cross-section of the top hammer blank, and the distance between the corresponding line of the bottom surface of the cross-section of the top hammer product and the corresponding line of the bottom surface of the cross-section of the top hammer blank, and then calculate the actual grinding amount of the large bevel, small bevel, top surface and bottom surface of the top hammer blank; S4. Extend the outer cylindrical surface corresponding line of the cross-sectional view of the top hammer product, make the outer cylindrical surface corresponding line of the cross-sectional view of the top hammer product intersect with the large oblique surface corresponding line of the cross-sectional view of the top hammer blank and obtain the intersection point, and draw an auxiliary line perpendicular to the bottom surface corresponding line of the cross-sectional view of the top hammer product, one end of the auxiliary line and one end of the line corresponding to the large oblique surface of the cross-sectional view of the top hammer product and one end of the line corresponding to the outer cylindrical surface of the cross-sectional view of the top hammer product are the common points, measure the shortest distance between the intersection point and the auxiliary line, multiply it by two and calculate to obtain the grinding amount of the outer cylindrical surface of the top hammer blank; S5. Process the top hammer blank according to the grinding amount obtained in step S3 and step S4.

[0005] The method of the present invention draws a blank cross-section line diagram and a product cross-section line diagram, so that the product cross-section line diagram is completely set in the blank cross-section line diagram, and then measures the distance between the blank cross-section line and the product cross-section line, and obtains the specific processing amount value by proportional amplification; then draws auxiliary lines, and then measures and proportionally amplifies to obtain the processing amount of the outer cylindrical surface of the top hammer blank. The present invention only needs to measure the size of a top hammer blank, and then draw and compare, and then proportionally amplify the measured value through the drawing to obtain the processing amount value. The processing amount calculation of each process is very convenient, which is convenient for arranging subsequent processing and can reduce production costs.

[0006] Among them, since the top hammer blanks are pressed from the same batch, it is only necessary to measure the size of one of the top hammer blanks, and draw the drawing based on the size of the top hammer blank; by measuring the actual size of the top hammer blank and drawing the cross-sectional view, it can be ensured that the processing process is based on the actual physical size, thereby improving the accuracy of the processing. Drawing the cross-sectional view helps to intuitively understand and compare the differences between the blank and the product, and is convenient for operators to carry out subsequent processing steps. Among them, the processing amount is at least the value corresponding to the first set distance. After completing the subsequent processing, the defective layer on the surface of the top hammer blank can be ground to ensure product quality. Among them, if the lines of the product cross-sectional view and the blank cross-sectional view do not overlap, they can be adjusted by moving the product cross-sectional view, which increases the flexibility of processing and facilitates operation.

[0007] Preferably, in step S2, the distance between the top surface of the cross-sectional view of the top hammer product and the top surface of the cross-sectional view of the top hammer blank is first set to a first set distance. If the outer edge line of the cross-sectional view of the top hammer product overlaps with the outer edge line of the cross-sectional view of the top hammer blank, or the distance between the corresponding lines of the large and small oblique surfaces of the cross-sectional view of the top hammer product and the corresponding lines of the large and small oblique surfaces of the cross-sectional view of the top hammer blank is greater than the second set distance, the cross-sectional view of the top hammer product is moved to make the distance between the top surface of the cross-sectional view of the top hammer product and the top surface of the cross-sectional view of the top hammer blank greater than the first set distance; otherwise, the cross-sectional view of the top hammer product is not moved, and step S3 is directly performed. By adjusting the position of the cross-sectional view of the product, it can be ensured that product defects will not be caused by size mismatch during the processing process, thereby improving the qualified rate of the product.

[0008] Preferably, in step S5, the outer cylindrical surface of the top hammer blank is ground first, and then the small inclined surface of the top hammer blank is ground, and then the top surface grinding, the large inclined surface grinding, and the bottom surface grinding are completed.

[0009] Grinding in a specific order can reduce interference during the processing and improve processing efficiency and quality. Among them, the grinding order of the top surface, large bevel and bottom surface can be adjusted according to actual production needs. When the tolerance of the outer circle is large, when grinding (surface grinding) a small bevel, more pressure needs to be pressed down, and then the top surface is pressed to ensure the top surface size. Insufficient height margin is prone to occur here. If the tolerance of the outer circle grinding is too large, the final height margin will be insufficient to achieve the outer circle tolerance. If the tolerance of the outer circle grinding is too small, the outer circle will be ground smaller because of the processing of the top surface, which will eventually cause the outer circle size to be smaller than the finished product requirement, resulting in scrap.

[0010] Preferably, in step S5, when performing small bevel grinding, the feed value of the grinding is shifted toward the positive tolerance.

[0011] Preferably, the deviation between the center of the top surface and the center of the outer cylindrical surface of the top hammer blank is measured. If the deviation is greater than a set range, a cross-sectional view of the top hammer blank is drawn according to the offset distance and the magnification ratio when drawing.

[0012] The invention has the advantages of reducing production cost and facilitating calculation of machining allowance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of a cross-sectional view of the top hammer blank of this embodiment.

[0014] Figure 2 A schematic diagram of a cross-sectional view of the top hammer product of this embodiment.

[0015] Figure 3 This is a schematic diagram of the case where two cross-sectional views of this embodiment are nested with each other, and the outer edge lines overlap or the spacing between them is less than the second set distance.

[0016] Figure 4 for Figure 3 Enlarged view of point A in .

[0017] Figure 5 This is a schematic diagram of a case where two cross-sectional views of this embodiment are nested with each other, the outer edge lines do not overlap, and the spacing is greater than the first set distance or the second set distance.

[0018] Figure 6 for Figure 5 Enlarged view of point B in .

[0019] Figure 7 It is a schematic diagram of measuring the deviation between the center of the top surface and the center of the outer cylindrical surface of the top hammer blank in this embodiment. DETAILED DESCRIPTION

[0020] The present invention will be further described below based on the accompanying drawings and specific embodiments.

[0021] This embodiment discloses a top hammer grinding method, comprising the following steps: S1. Measure the dimensions of each surface of the top hammer blank, measure the deviation between the center of the top surface and the center of the outer cylindrical surface of the top hammer blank, and draw the following diagram according to the slope of each surface: Figure 1 and Figure 2 The cross-sectional view 100 of the top hammer blank is shown, and the cross-sectional view 200 of the top hammer product is drawn; S2. Figure 3 and Figure 4 As shown in FIG. 1 , the cross-sectional view 200 of the top hammer product is placed in the cross-sectional view 100 of the top hammer blank, so that the top surface 201 of the cross-sectional view 200 of the top hammer product is located below the top surface 101 of the cross-sectional view 100 of the top hammer blank, as shown in FIG. Figure 5 As shown, the distance between the top surface 201 of the top hammer product cross-sectional view 200 and the top surface 101 of the top hammer blank cross-sectional view 100 is greater than or equal to the first set distance, and the outer edge lines of the top hammer product cross-sectional view 200 and the outer edge lines of the top hammer blank cross-sectional view 100 do not overlap; wherein, if the deviation value is greater than the set range, the top hammer product cross-sectional view 200 and the top hammer blank cross-sectional view 100 are deviated from the corresponding deviation value accordingly; wherein, Figure 4 The X indicates unqualified areas, where the lines overlap or are too close.

[0022] S3. Measure the distance between the corresponding line of the large bevel 202 of the top hammer product cross-sectional view 200 and the corresponding line of the large bevel 102 of the top hammer blank cross-sectional view 100, the distance between the corresponding line of the small bevel 203 of the top hammer product cross-sectional view 200 and the corresponding line of the small bevel 103 of the top hammer blank cross-sectional view 100, the distance between the corresponding line of the outer cylindrical surface 204 of the top hammer product cross-sectional view 200 and the corresponding line of the outer cylindrical surface 104 of the top hammer blank cross-sectional view 100, and the distance between the corresponding line of the bottom surface 205 of the top hammer product cross-sectional view 200 and the corresponding line of the bottom surface 105 of the top hammer blank cross-sectional view 100, and then calculate the actual grinding amount of the large bevel 102, the small bevel 103, the top surface 101 and the bottom surface 105 of the top hammer blank; S4. Figure 6 The corresponding line of the outer cylindrical surface 204 of the top hammer product cross-sectional view 200 is extended as shown, so that the corresponding line of the outer cylindrical surface 204 of the top hammer product cross-sectional view 200 intersects with the corresponding line of the large inclined surface 102 of the top hammer blank cross-sectional view 100 to obtain an intersection point a, and an auxiliary line α perpendicular to the corresponding line of the bottom surface 105 of the top hammer product cross-sectional view 200 is drawn, and one end of the auxiliary line α and one end of the corresponding line of the large inclined surface 102 of the top hammer product cross-sectional view 200 and one end of the corresponding line of the outer cylindrical surface 104 of the top hammer product cross-sectional view 200 have a common point, and the shortest distance l between the intersection point a and the auxiliary line α is measured, and l is multiplied by two to calculate to obtain the grinding amount of the outer cylindrical surface 104 of the top hammer blank; S5. Process the top hammer blank according to the grinding amount obtained in step S3 and step S4.

[0023] In step S1, since the shape of the mold is fixed, during the top hammer sintering process, the entire pressed blank will shrink, the shrinkage coefficient will differ by 0.001, and the size of the entire top hammer blank will differ by several tens of wires, but its shrinkage is overall shrinkage, so the angles of the large and small bevels of the formed top hammer blank are fixed. In this embodiment, the angle formed by the large bevel and the top surface is 46°, and the angle formed by the small bevel and the top surface is 41°; therefore, when measuring the dimensions of each surface, the dimensions of the large or small bevel may not be measured, and the large or small bevel may be drawn according to the angle formed by the large and small bevels and the top surface. CAD or CAXA software may be used for drawing.

[0024] Among them, the height (the distance between the top surface and the bottom surface) and width (the maximum diameter of the outer cylindrical surface, the width of the top surface) of the top hammer blank can be measured by a digital vernier caliper; a measuring instrument such as a digital vernier caliper can be clamped at the approximate center line of the top hammer blank, and then rotated while ensuring clamping, and the maximum value is read as the maximum outer diameter of the outer cylindrical surface of the top hammer blank, and the distance between the upper and lower ends of the large inclined surface or the distance between the upper and lower ends of the small inclined surface can be measured by any existing measuring equipment.

[0025] Wherein, in step S2, the distance between the top surface of the cross-sectional view of the top hammer product and the top surface of the cross-sectional view of the top hammer blank is first set to a first set distance. If the outer edge line of the cross-sectional view of the top hammer product overlaps with the outer edge line of the cross-sectional view of the top hammer blank, or the distance between the corresponding lines of the large and small oblique surfaces of the cross-sectional view of the top hammer product and the corresponding lines of the large and small oblique surfaces of the cross-sectional view of the top hammer blank is greater than the second set distance, the cross-sectional view of the top hammer product is moved downward to make the distance between the top surface of the cross-sectional view of the top hammer product and the top surface of the cross-sectional view of the top hammer blank greater than the first set distance, until the outer edge line of the cross-sectional view of the top hammer product does not overlap with the outer edge line of the cross-sectional view of the top hammer blank, and the distance between the corresponding lines of the large and small oblique surfaces of the cross-sectional view of the top hammer product and the corresponding lines of the large and small oblique surfaces of the cross-sectional view of the top hammer blank is greater than the second set distance; otherwise, the cross-sectional view of the top hammer product is not moved, and step S3 is directly performed. Wherein, the first set distance and the second set distance of this embodiment are both 0.5 mm.

[0026] Depend on Figure 7As shown, in step S1, when measuring the deviation value between the center of the top surface and the center of the outer cylindrical surface of the top hammer blank, one side of the square is in contact with the outer cylindrical surface of the top hammer blank, and the other side of the square is in contact with the top surface of the top hammer blank, and then the distance between the outermost point of the outer cylindrical surface and the outermost point of the top surface is read; since the top hammer generally has four faces, the above measurement needs to be performed four times. If the deviation value is within the allowable range, it is normal. If the deviation to one side exceeds the allowable range, the top hammer blank needs to be drawn according to the offset distance and the magnification ratio when drawing. In this embodiment, taking the outer circle as the reference, in the case of top deviation, more dimensions need to be pressed down to meet the effect that the cross-sectional view of the top hammer blank wraps the cross-sectional view of the entire top hammer product. In the case of a top deviation of 1mm, the top surface needs to be pressed down by 2.3mm to meet the large bevel grinding amount above the second set distance.

[0027] In step S5, the outer cylindrical surface of the top hammer blank is first ground, and then the small inclined surface of the top hammer blank is ground, and then the top surface grinding, the large inclined surface grinding, and the bottom surface grinding are completed in sequence. Among them, when the small inclined surface is ground, the feed value of the grinding is offset toward the positive tolerance. The other grinding process requirements and processing procedures of this embodiment are the same as the existing top hammer grinding requirements and processes.

[0028] This embodiment has the advantages of reducing production costs and facilitating calculation of machining allowances.

Claims

1. A top hammer grinding method, characterized in that The steps include: S1. Measure the dimensions of each surface of the top hammer blank, draw a cross-sectional view of the top hammer blank according to the inclination of each surface, and draw a cross-sectional view of the top hammer product; S2. Place the cross-sectional view of the top hammer product in the cross-sectional view of the top hammer blank, so that the top surface of the cross-sectional view of the top hammer product is located below the top surface of the cross-sectional view of the top hammer blank, so that the distance between the top surface of the cross-sectional view of the top hammer product and the top surface of the cross-sectional view of the top hammer blank is greater than or equal to the first set distance, and the outer edge line of the cross-sectional view of the top hammer product does not overlap with the outer edge line of the cross-sectional view of the top hammer blank; S3. Measure the distance between the corresponding line of the large bevel of the cross-sectional view of the top hammer product and the corresponding line of the large bevel of the cross-sectional view of the top hammer blank, the distance between the corresponding line of the small bevel of the cross-sectional view of the top hammer product and the corresponding line of the small bevel of the cross-sectional view of the top hammer blank, the distance between the corresponding line of the outer cylindrical surface of the cross-sectional view of the top hammer product and the corresponding line of the outer cylindrical surface of the cross-sectional view of the top hammer blank, and the distance between the corresponding line of the bottom surface of the cross-sectional view of the top hammer product and the corresponding line of the bottom surface of the cross-sectional view of the top hammer blank, and then calculate the actual grinding amount of the large bevel, small bevel, top surface and bottom surface of the top hammer blank; S4. Extend the outer cylindrical surface corresponding line of the cross-sectional view of the top hammer product, make the outer cylindrical surface corresponding line of the cross-sectional view of the top hammer product intersect with the large oblique surface corresponding line of the cross-sectional view of the top hammer blank and obtain the intersection point, and draw an auxiliary line perpendicular to the bottom surface corresponding line of the cross-sectional view of the top hammer product, one end of the auxiliary line and one end of the line corresponding to the large oblique surface of the cross-sectional view of the top hammer product and one end of the line corresponding to the outer cylindrical surface of the cross-sectional view of the top hammer product are the common points, measure the shortest distance between the intersection point and the auxiliary line, multiply it by two and calculate to obtain the grinding amount of the outer cylindrical surface of the top hammer blank; S5. Processing the top hammer blank according to the grinding amount obtained in step S3 and step S4.

2. The top hammer grinding method according to claim 1, characterized in that: In step S2, the distance between the top surface of the cross-sectional view of the top hammer product and the top surface of the cross-sectional view of the top hammer blank is first set to a first set distance. If the outer edge lines of the cross-sectional view of the top hammer product overlap with the outer edge lines of the cross-sectional view of the top hammer blank, or the distance between the corresponding lines of the large and small oblique surfaces of the cross-sectional view of the top hammer product and the corresponding lines of the large and small oblique surfaces of the cross-sectional view of the top hammer blank is greater than a second set distance, the cross-sectional view of the top hammer product is moved so that the distance between the top surface of the cross-sectional view of the top hammer product and the top surface of the cross-sectional view of the top hammer blank is greater than the first set distance; otherwise, the cross-sectional view of the top hammer product is not moved, and step S3 is performed directly.

3. The top hammer grinding method according to claim 1, characterized in that: In step S5, the outer cylindrical surface of the top hammer blank is firstly ground, and then the small inclined surface of the top hammer blank is ground, and then the top surface grinding, the large inclined surface grinding, and the bottom surface grinding are completed.

4. The top hammer grinding method according to claim 1 or 3, characterized in that: In step S5, when performing small bevel grinding, the feed value of the grinding is shifted toward the positive tolerance.

5. The top hammer grinding method according to claim 1, characterized in that: Measure the deviation between the top surface center and the outer cylindrical surface center of the top hammer blank. If the deviation is greater than the set range, draw the cross-section of the top hammer blank according to the offset distance and the enlargement and reduction ratio when drawing.

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