Clamp for detecting tooth height and blood groove of forge piece femoral stem

Abstract

The utility model provides a clamp for detecting tooth height and blood grooves of a forge piece femoral stem, and belongs to the technical field of metal forging mechanical precision machining. Comprising a clamp body, a product containing cavity is formed in the front surface of the clamp body, the shape of the product containing cavity is matched with that of a femoral stem, the product containing cavity is used for containing and supporting the femoral stem, and a pressing plate device used for pressing the femoral stem is arranged on the clamp body. The clamp is an auxiliary clamp designed for measuring the tooth height and the blood groove depth of the femoral stem, can ensure that each femoral stem product is accurately measured, ensures that the product is qualified, and is light in weight, low in cost, stable in clamping and long in service life.

Description

TECHNICAL FIELD

[0001] The utility model belongs to metal forging machinery precision machining technical field, concretely relates to a clamp for the detection of tooth height and blood groove of forged femoral stem, and is a kind of auxiliary tool for measuring tooth height and blood groove depth after the finish machining of forged femoral stem. BACKGROUND

[0002] After the complete removal of flash (mold line), femoral stem is deeply finished machined, and some teeth or blood grooves are added to the abdomen and back of product, which has many advantages for product, as follows: (1) blood groove advantage: promote liquid flow, bone growth into channel, reduce stress shielding. (2) tooth advantage: enhance mechanical locking, promote bone growth, anti-rotation stability. Because blood groove and tooth respectively improve the fixing effect of femoral stem through "space guide" and "surface interlocking" mechanism, so most femoral stems now add blood groove and tooth, and femoral stem belongs to irregular object, so the data measurement of tooth and blood groove becomes a big difficulty. Therefore, a clamp device for conveniently measuring tooth height and blood groove depth of femoral stem is urgently needed. SUMMARY

[0003] The utility model solves technical problems: provide a kind of clamp for the detection of tooth height and blood groove of forged femoral stem, the utility model is designed for a kind of auxiliary clamp for measuring tooth height and blood groove depth of femoral stem, and the purpose is to ensure that each femoral stem product can be accurately detected, and ensure product qualification.

[0004] To achieve the above object, the utility model adopts the technical scheme of:

[0005] The clamp for the detection of tooth height and blood groove of forged femoral stem includes clamp body, product placement cavity is arranged on the front surface of the clamp body, the product placement cavity is adapted to the shape of femoral stem for placing and supporting, and a pressing plate device for pressing the femoral stem is arranged on the clamp body.

[0006] Further limit to the above scheme, the product placement cavity is provided with flat groove in the middle, the product placement cavity is divided into left and right parts by the flat groove, vertical support tooth is arranged in the left part of the inner cavity of the product placement cavity, the vertical support tooth is adapted to the vertical tooth structure on the left side of femoral stem, horizontal support tooth is arranged in the right part of the inner cavity of the product placement cavity, the horizontal support tooth is adapted to the horizontal tooth structure on the right side of femoral stem, and the surfaces of the vertical support tooth and the horizontal support tooth are higher than the inner plane of the flat groove.

[0007] Further limit to the above scheme, reference groove is arranged on the upper part of the front surface of the clamp body, one side of the reference groove is provided with reference surface I, and the reference surface I is machined according to the reference surface A on femoral stem as reference.

[0008] Further defining the above solution, the fixture body is provided with a clearance groove at the right end of the product placement cavity, and the lower side of the clearance groove is provided as a reference surface II. The reference surface II is machined according to the center line B on the femoral stem so that the reference surface II coincides with the center line B.

[0009] Further defining the above solution, the pressure plate device includes a pressure plate support step and a pressure plate. The pressure plate support step is fixed on the front surface of the fixture body. A pressure plate fixing screw hole is provided on the surface of the fixture body between the pressure plate support step and the product placement cavity. The two ends of the pressure plate press on the pressure plate support step and the femoral stem placed in the product placement cavity, respectively. The pressure plate fixing screw passes through the hole on the pressure plate and engages with the pressure plate fixing screw hole to fix the pressure plate.

[0010] As a further limitation of the above scheme, the lower part of the clamp body is provided with a base for support.

[0011] As a further specification of the above solution, the fixture body is made of aluminum alloy.

[0012] Advantages of this utility model compared to the prior art:

[0013] 1. This solution is an auxiliary tooling for measuring the height of the femoral stem teeth and the depth of the blood groove. By fixing the femoral stem on the fixture, it can ensure the accurate measurement of the femoral stem test data and ensure product qualification.

[0014] 2. This solution can easily measure the tooth height and blood groove depth of each product. The fixture is lightweight, low-cost, stable in clamping, and has a long service life. Attached Figure Description

[0015] Figure 1 This is a front view of the structure of this utility model;

[0016] Figure 2 In this utility model Figure 1 Sectional view along line AA in the middle;

[0017] Figure 3 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure for mounting the femoral stem on this utility model. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] Please see Figures 1-4 The embodiments of this utility model are described in detail below.

[0023] Example: A fixture for detecting the height of the femoral stem teeth and the blood groove in forged parts, see reference. Figures 1-3 As shown, the fixture includes a clamp body 1, and a product placement cavity 2 is provided on the front surface of the clamp body 1. The product placement cavity 2 is adapted to the shape of the femoral stem 13 for placement and support. The clamp body 1 is provided with a pressure plate device for pressing the femoral stem 13.

[0024] In this embodiment, the femoral stem is fixed to the clamp during use, which ensures accurate measurement of the femoral stem's detection data and guarantees product qualification.

[0025] In one specific implementation: See Figure 1As shown, the product placement cavity 2 has a flat groove 5 in the middle, and the product placement cavity 2 is divided into left and right parts by the flat groove 5. The left part of the product placement cavity 2 has a vertical support tooth 3 in its inner cavity, and the vertical support tooth 3 is adapted to the vertical tooth structure on the left side of the femoral stem 13. The right part of the product placement cavity 2 has a horizontal support tooth 4 in its inner cavity, and the horizontal support tooth 4 is adapted to the horizontal tooth structure on the right side of the femoral stem 13. The surfaces of the vertical support tooth 3 and the horizontal support tooth 4 are both higher than the inner plane of the flat groove 5.

[0026] In this embodiment, a flat groove 5 with a low bottom surface is provided in the middle of the product placement cavity, which can ensure that the two sides of the femoral stem are tightly supported on the support teeth on both sides, so as to achieve stable support for the femoral stem.

[0027] In one specific implementation: See Figure 1 As shown, the upper part of the front surface of the fixture body 1 is provided with a reference groove, and one side of the reference groove is provided as a reference surface I6. The reference surface I6 is machined based on the reference surface A on the femoral stem 13.

[0028] In this embodiment, reference surface I is machined based on reference surface A on the femoral stem. In fact, the reference on the product is moved to a place on the fixture body that is convenient for measurement by the measuring ruler, which facilitates measurement and use.

[0029] In one specific implementation: See Figure 1 As shown, the fixture body 1 has a clearance groove 11 at the right end of the product placement cavity 2. The lower side of the clearance groove 11 is set as a reference surface II7. The reference surface II7 is machined according to the center line B on the femoral stem 13 so that the reference surface II7 coincides with the center line B.

[0030] In this embodiment, the clearance groove is used to accommodate the end of the femoral stem and prevent interference with installation; the reference surface II is machined according to the center line B on the femoral stem, which is actually transferring the center line B on the product to a place on the fixture body that is easy to measure, making it convenient for measurement and use.

[0031] In one specific implementation: See Figure 4 As shown, the pressure plate device includes a pressure plate support step 8 and a pressure plate 10. The pressure plate support step 8 is fixed on the front surface of the clamp body 1. The clamp body 1 surface between the pressure plate support step 8 and the product placement cavity 2 is provided with a pressure plate fixing screw hole 9. The two ends of the pressure plate 10 press on the pressure plate support step 8 and the femoral stem 13 placed in the product placement cavity 2, respectively. The pressure plate fixing screw 14 passes through the hole on the pressure plate 10 and engages with the pressure plate fixing screw hole 9 to fix the pressure plate 10.

[0032] In this embodiment, the product is fixed by a pressure plate, which is simple in structure, easy to operate, and achieves reliable fixation of the product.

[0033] In one specific implementation: See Figure 3 As shown, the lower part of the fixture body 1 is provided with a base 12 for support, which makes it easy to place the fixture on the workbench.

[0034] Preferably, the clamp body 1 is made of aluminum alloy material, which makes the clamp lightweight, low cost, stable clamping and long service life.

[0035] The use of this fixture involves four steps: (1) Place the fixture on the testing platform; (2) Place the femoral stem of the product into the product placement cavity and press the product down firmly into the cavity by hand; (3) Use a pressure plate to press down the fixed product to prevent the product from shaking continuously during production, which would lead to inaccurate measurement data; (4) Use a height gauge to directly measure the height of the upper teeth of the femoral stem and the depth of the blood groove to obtain the data.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fixture for detection of tooth height and blood groove of a forged femoral stem, characterized in that: The clamp body (1) is provided with a product placing cavity (2) on the front surface, which is matched with the shape of the femoral stem (13) for placing and supporting, and the clamp body (1) is provided with a pressing plate device for pressing the femoral stem (13).

2. The fixture for detection of tooth height and blood groove of a forged femoral stem according to claim 1, characterized in that: The product placing cavity (2) is provided with a flat groove (5) in the middle, which is divided into left and right parts, the left part is provided with a vertical support tooth (3) in the inner cavity, which is matched with the vertical tooth structure on the left side of the femoral stem (13), the right part is provided with a horizontal support tooth (4) in the inner cavity, which is matched with the horizontal tooth structure on the right side of the femoral stem (13), and the surfaces of the vertical support tooth (3) and the horizontal support tooth (4) are higher than the inner plane of the flat groove (5).

3. The fixture for detection of tooth height and blood groove of a forged femoral stem according to claim 1, wherein: The front surface of the clamp body (1) is provided with a reference groove, one side of which is provided with a reference surface I (6), which is machined according to the reference surface A on the femoral stem (13).

4. The fixture for detection of tooth height and blood groove of a forged femoral stem according to claim 1, wherein: The right end of the clamp body (1) is provided with an avoiding groove (11) in the product placing cavity (2), the lower side of which is provided with a reference surface II (7), which is machined according to the center line B on the femoral stem (13), so that the reference surface II (7) coincides with the center line B.

5. The fixture for detection of tooth height and blood groove of a forged femoral stem of claim 1, wherein: The pressing plate device includes a pressing plate support step (8) and a pressing plate (10), the pressing plate support step (8) is fixed on the front surface of the clamp body (1), the surface of the clamp body (1) between the pressing plate support step (8) and the product placing cavity (2) is provided with a pressing plate fixing screw hole (9), the two ends of the pressing plate (10) are pressed on the pressing plate support step (8) and the femoral stem (13) placed in the product placing cavity (2), respectively, and the pressing plate fixing screw (14) is screwed through the hole on the pressing plate (10) and the pressing plate fixing screw hole (9) to fix the pressing plate (10).

6. The fixture for detection of tooth height and blood groove of a forged femoral stem of claim 1, wherein: The lower part of the clamp body (1) is provided with a base (12) for supporting.

7. The fixture for detection of tooth height and blood groove of a forged femoral stem of claim 1, wherein: The clamp body (1) is made of aluminum alloy material.

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